Viagra patent information in canada - Canada viagra by mail

Teva Canada Ltd v Pfizer Canada Inc - Wikipedia, the free ...

Image caption Viagra was due to go off-patent in Canada in 2014 ... The court said Pfizer had withheld disclosure of certain information about ... Full case name, Teva Canada Limited v Pfizer Canada Inc., Pfizer Inc., Pfizer .... In its original judgment, the Court declared that Pfizer's patent for sildenafil was ... Canada's Supreme Court struck down the patent on global ... not provided enough information to allow another company to produce Viagra.


Supreme Court Amends Earlier Decision: Viagra Patent Not ...

Canada's top court has ruled that Pfizer's patent on the company's groundbreaking erectile dysfunction drug Viagra is void.

The Supreme Court of Canada sided Thursday with Teva Canada Ltd., a division of the Israeli-based Teva pharmaceutical empire, in a long-standing court battle against Pfizer over whether or not the latter company has the right to the patent in the first place.

Teva had argued that the details provided in Pfizer's original patent application (number 2,163,446, granted in 1998 and set to expire in 2014) was invalid because in it, Pfizer listed several different chemical compounds without ever specifying which one was the actual active ingredient — sildenafil. 

Canada's Patent Act gives a company a 16-year monopoly on a product if it can prove it is a new invention. In return, the company must show publicly in its application how it created its product.