Expired Canadian patentCanada
Method for treating patients with precancerous lesions by administering substituted sulfonyl indenyl acetic and propionic acids and esters thereof
CA 2062422 C · Owner: Brendel, Klaus · Inventors: Pamukcu, Rifat; Brendel, Klaus
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted indenyl sulfonyl acetic acids are useful in the treatment of precancerous lesions.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 6, 1992 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 6, 1992
GrantedOctober 14, 1997
Term endedMarch 6, 2012
Patent numberCA 2062422 C
Classification (IPC)A61K31/19 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.