Disclosure: When can it invalidate a patent?

Can a prior disclosure of an invention be fatal to a patent? And if so, what constitutes “disclosure” of the invention.

One of the central pillars of patentability is “novelty” - the invention must be new, the first of its kind in the world. If it’s not new, the patent application will fail or (if discovered after the patent has issued) the patent itself can be invalidated. Wenzel Downhole Tools Ltd. v. National-Oilwell Canada Ltd., 2011 FC 1323 (CanLII) is an interesting judgement dealing with a device that was manufactured and rented to a third party for use in drilling an oil well in Texas prior to the relevant date of the Canadian patent. This earlier device invalidated the patent, since it constituted an “enabling disclosure” of the invention more than 12 months prior to filing of the patent application. In this case, to prove when the earlier device was invented and disclosed, an expert was called in to examine the metadata for the design drawings, to verify when the drawings were created.

The business lessons?

  • Remember that a prior disclosure of an invention can be fatal to a patent. For the purposes of patent law, a “disclosure” of the invention can be as simple as using the invention or a prototype for a customer. For example, putting a single device into the hands of a customer without restrictions or confidentiality obligations has been held to constitute prior use which invalidated the patent.
  • Experimental use of the invention may be permitted in certain circumstances. True experimentation will not be considered a “disclosure” for these purposes. However, a use will only be experimental if it is so in the mind of the user.
  • If disclosure of the patented device was made on a confidential basis, it will not be considered a “disclosure” for these purposes, if handled properly. Therefore, confidentiality (and a properly drafted non-disclosure agreement) is critical.

Related Event: Interested in learning more? Join us on September 26, 2012 - Field Law is hosting a meeting of The Licensing Executives Society  (Calgary Chapter) on the topic of: The Perils of Disclosure: Invention Disclosure and Patent Grace Periods presented by Roseann Caldwell, Bennett Jones LLP. See link for details and registration.

Calgary - 07:00 MDT

No comments yet. Be the first.

Leave a reply

You must be logged in to post a comment.


Deprecated: Function set_magic_quotes_runtime() is deprecated in /home/rstobbe/ipblog.ca/wp-content/themes/rstobbe/style.php on line 118

Deprecated: Function set_magic_quotes_runtime() is deprecated in /home/rstobbe/ipblog.ca/wp-content/themes/rstobbe/style.php on line 125
Casodex without prescription mexico purchase Benicar pay pal online without rx can i get Revia without rx order Revia pay pal online without rx order Zovirax without a prescription overnight shipping buy prescription Vantin online order Arcoxia online overnight shipping buy Cycrin in england Buy Benicar without a prescription buy Desogen doctor prescription Revia over the counter buy Cycrin online without a prescription where can i get Tenormin Benicar effects buy 90 mg arcoxia Online Zovirax buy vantin without rx from us pharmacy Cleocin order Zovirax online cheap buy Atarax overnight delivery buy Principen no scams Cycrin no prescription to buy buy Casodex no prescription cod to buy Keflex online purchase Lamictal Revia without prescriptions in usa orlistat can i buy orlistat online purchase generic xenical online purchase xenical no visa online without prescription orlistat for sale cheapest place to buy orlistat buy online rx xenical without orlistat online no prescription buy cheap generic xenical online canada pharmacy no prescription order xenical without rx orlistat overnight without prescription buy generic orlistat online no prescription xenical without a rx ordering xenical over the counter order orlistat online overnight shipping buy xenical online with overnight delivery discount orlistat order lamictal overnight cheap where to purchase generic atarax online without a prescription where to buy cheap casodex no prescription buy benicar without a percsription uk lamictal generic safety order keflex casodex overnight online vantin no prescription to buy asacol prescription from s online atarax 100 mg cytotec purchase without prescription buy cheap generic vantin online canada pharmacy no prescription generic 20mg benicar online how to get prescription of lamictal buy vantin in uk how to get keflex without zovirax usa buy cheap desogen with dr. prescription feldene without script purchasing benicar canadian zovirax diet pills without a prescription purchase cycrin pay pal online without prescription buy desogen online overnight buy cheap zovirax online tenormin without rx revia in canada how to buy asacol online without rx buy vantin tablets without prescription buy atarax amex online without rx purchase cheap online principen zovirax with out a prescription where to buy cheap zovirax no prescription feldene available at health department desogen purchased online without prescription keflex precio buy keflex c o d buy benicar doctor prescription order desogen amex online without prescription buy online desogen without rx zovirax apotheke buy vantin no rx wholesale zovirax cheap lamictal 100mg generic asacol 400 mg buy zovirax online overnight arcoxia ordering generic benicar no prescription i want a zovirax prescription lamictal ordering without a dr casodex no rx canadian prescriptions keflex keflex with no prescription and delivered over night revia online online us pharmacy zovirax buy revia epharmacist tenormin without prescriptions in usa keflex online consultation overnight purchase revia online no membership overnight shipping buy revia in england order benicar on line buy tenormin online without script canadian vantin diet pills without a prescription buy atarax on line amex buy tenormin overnight delivery buy vantin overnight orlistat online order buying xenical without a prescription purchase orlistat without prescription to ship overnight order xenical no visa order xenical no prescription buy orlistat on line amex medikament orlistat orlistat suppliers xenical on line no prescription order cheap overnight xenical xenical prescription online next day delivery buy in orlistat uk generic xenical online xenical no prescription needed 120mg orlistat online pharmacy where to buy xenical no prescription order overnight xenical xenical with no r x and free shipping purchase orlistat prescription online buy xenical without a prescription in the united states buying xenical online orlistat buy no prescription orlistat overdose order orlistat without a rx overnight shipping no prescription xenical on line pharmacy xenical without a prescription or membership orlistat generic buy xenical amex online generic orlistat canada xenical online with next day shipping xenical without a presciption no prescription orlistat cod delivery order cheap overnight xenical i need to order xenical without presciption and order it cod orlistat online no prescription and overnight no prescription required for xenical online pharmacy orlistat no prescription online overnight shipping xenical el orlistat generico orlistat from canada xenical no rx foreign cytotec online purchase buy orlistat c o d order buy orlistat online generic orlistat xenical buy online without rx no prescription xenical canadian generic orlistat no prescription buy xenical 120mg no rx orlistat buy xenical 120mg buy orlistat no prescriptions online purchase xenical order xenical cheap overnight purchase cheap orlistat cod free fedex how to get orlistat online no prescription in 120 days cheap orlistat usa xenical over night buy cheapest orlistat purchase xenical online no membership purchase orlistat prescription online how to buy xenical online without a rx no prescription generic xenical orlistat online prescription orlistat 120 mg without a prescription orlistat available canada cheap orlistat no prescription indian xenical purchase xenical online without script xenical online with no prescription or membership orlistat order on line purchase orlistat free consultation i want to buy orlistat without a perscription buy orlistat online without prescription from canada buy genuine orlistat online cheap order rx orlistat buy orlistat pills no prescription orlistat buy online in stock orlistat in usa buy orlistat in england orlistat for sale order orlistat without rx needed purchase orlistat without rx needed order orlistat without rx needed orlistat buy online in stock buy xenical online cheap xenical online order buy xenical no visa without rx orlistat order on line buy discount orlistat purchase orlistat usa cod orlistat sale no prescription xenical without a presciption buy generic orlistat canada buy orlistat online order xenical amex online without prescription buy xenical tablets without prescription (buy orlistat pills|buy Orlistat oral) (ordering orlistat from canada without a prescription|Orlistat purchase without perscripotion|buy cheap generic Orlistat online canada pharmacy no prescription|buy generic Orlistat online no prescription quick delivery|buy Orlistat online without prescription from canada|buy Orlistat without rx|cheap Orlistat no prescription|Orlistat online|how to order Orlistat|i need to order Orlistat without a prescription|low price rx online website Orlistat|online pharmacy Orlistat no prescription|Orlistat generic sale|Xenical without prescription|where can i get Orlistat without a prescription|Orlistat cheap online) (prescription orlistat|Orlistat online purchase|buy Xenical australia|Orlistat online cheap|order Orlistat without rx|UK medication Orlistat Xenical buy online|where to purchase Orlistat oral cheap) (order orlistat mastercard|canadian generic Orlistat no prescription|non prescription Orlistat) no prescriptions needed for xenical (orlistat 120mg tablets express shipping|Orlistat without prescription|order Orlistat online overnight shipping|Orlistat for sale without prescription|Orlistat without rx) xenical prescription online next day delivery xenical prescription from doctors online (orlistat no doctors prescription|buy discounted Orlistat online|buy non prescription drugs generic Orlistat|buy Orlistat online without prescription from canada|buy Orlistat next day delivery|canadian pharmacy Orlistat|generic Orlistat from india|how to buy Orlistat without a prescription|how to get Orlistat|Orlistat online no prescription 120 mg|Orlistat online without prescription|Orlistat to buy in canada|Orlistat with out a prescription) xenical overnight delivery fed ex next day fedex shipping for xenical buy on line orlistat getting orlistat without doctor buy orlistat cheap without prescription orlistat express online buy orlistat without a prescription in the united states how to buy orlistat without a prescription no rx needed for purchasing xenical no prescription orlistat buy orlistat over the counter xenical sale no prescription order orlistat no visa cheap orlistat without a prescription get orlistat without prescription generic orlistat prices orlistat overnight delivery fed ex purchase orlistat online no membership overnight shipping overnight xenical without a prescription i want a xenical prescription order generic xenical online no prescription orlistat no rx buy orlistat no visa without rx buy cheap xenical without prescription buy cheap orlistat line where can i buy orlistat without a prescription buy orlistat australia generic orlistat canada generic orlistat no prescription (buy orlistat canada|generic Orlistat no prescription|Orlistat oral tablet no prescription discount|non prescription Orlistat|ordering Orlistat online without a precription|Orlistat online without a prescription) buy orlistat canada xenical without script buy no prescription xenical fedex xenical overnight without a rx purchase xenical amex online without prescription online overnight shipping xenical how to get orlistat online no prescription in 120 days order xenical without rx xenical online consultation overnight orlistat cost xenical without script xenical without a prescription overnight shipping buy no prescription xenical order xenical without rx from us pharmacy generic xenical no prescription problems with buying orlistat without rx buy orlistat online without a prescription generic xenical without a precsriptions buy line orlistat online pharmacy no prescription orlistat buy xenical free consultation buy orlistat no scams order generic orlistat online no prescription buy orlistat free consultation online consultation for xenical orlistat without prescription shipped overnight express purchase xenical money purchase buy orlistat usa generic xenical no prescription purchase online prescription xenical buy orlistat without a rx overnight delivery how to order orlistat online without a rx buy orlistat without rx order orlistat online overnight shipping purchase xenical usa cod buy xenical online with no perscription buy orlistat from india cheap xenical for sale online no prescription required buy Maxalt drugs Maxalt online prescription buy Maxalt us how to buy arimidex arimidex 1mg side effects order arimidex overnight arimidex purchase overnight delivery order arimidex online no prescription buy generic arimidex uk buy keflex epharmacist buy atarax cod next day delivery buy arcoxia doctor prescription revia 50mg fedex keflex without priscription buy next day keflex benicar with no presciption atarax purchase without prescription buy revia with american express buy vantin online 200 mg no prescription buy lamictal in united states online atarax side effects purchase asacol online no membership overnight shipping no prescription needed feldene principen with no prescriptions buy vantin online 200 mg no prescription Maxalt apotheke buy Maxalt epharmacist buy Maxalt legally Maxalt online no prescription buy Maxalt online us pharmacy order Maxalt no rx Maxalt buy Maxalt buy Maxalt no prescription uk buy Maxalt online purchase Maxalt buy Maxalt in england Maxalt overnight cod ordering maxalt online buy Maxalt cash on delivery Maxalt cheap mexican uk buy Maxalt Maxalt rezept buying Maxalt online discount Maxalt buy Maxalt visa no prescription Maxalt purchase cheap online Maxalt buy Maxalt american express Maxalt by mail buy Maxalt online us pharmacy buy Maxalt online now non rx cheap Maxalt purchase Maxalt online buy maxalt mastercard Maxalt prices Maxalt online prescription Maxalt tablets Maxalt prices Maxalt fedex shipping Maxalt 10mg is it legal to buy Arimidex online Arimidex tablets 1 mg no prescription australia buy online Arimidex 1 mg Arimidex rx cheap best place order Arimidex where to buy Arimidex Arimidex online australia buy Revia buy revia without a percsription order rx free tenormin canadian pharmacy no prescription asacol order cycrin 10 mg without prescription purchase asacol online no membership order buy arcoxia online buy vantin without a rx buy casodex without a prescription to ship overnight ordering benicar over the counter generic vantin uk online revia purchase purchase revia online without prescription non presciption revia cheapest place to buy revia buy revia without a perscription non prescription cheap revia order no online rx revia buy revia no visa without rx problems with buying revia without rx uk order revia Keflex without script purchase Atarax visa without prescription order Atarax without rx needed Keflex available canada buy Keflex diet pill Tenormin fedex cytotec 100 mg without prescription where to buy Premarin online prednisolone online uk Premarin 0.625mg what is it used for buy requip from canada is requip a prescription drug mail order requip Premarin purchase online cost of Premarin canada buy cheap Premarin online prednisolone online uk buy requip 1mg buy requip online usa order requip canada cheap requip online how to buy requip online ordering zovirax buy discount feldene principen without prescription medications where can i purchase lamictal no rx buy cheap asacol without a prescription purchasing vantin online without prescription buy cheap generic arcoxia where to purchase generic revia online without a prescription buying atarax online without prescription online pharmacy Maxalt purchase maxalt without prescription to ship overnight buy Maxalt diet pills buy genuine Maxalt online buy pharmacy Maxalt waterview buy Maxalt Maxalt bestellen Rizatriptan Maxalt buy Maxalt usa buy Maxalt on line cycrin shipped c.o.d. purchase cleocin no visa without prescription buy cleocin tablets canadian pharmacy no prescription atarax cheap cleocin no prescription pharmacy keflex no prescrption lamictal online buy saturday delivery buy vantin overnight delivery can i get vantin without rx purchase principen amex online without rx revia effects buy asacol on line buy cheapest casodex buy revia online uk buy vantin overnight delivery zovirax without dr vantin with no rx buy 1 mg Arimidex uk cheap Arimidex buy Arimidex 1mg canada buy Arimidex 1 mg online can i get Arimidex without rx buy 1mg Arimidex requip online for dogs requip buy where can i buy requip online cost of requip australia purchase Premarin online