Expired Canadian patentCanada
Intraocular pressure reducing 11-acyl prostaglandins
CA 2021316 C · Owner: Chan, Ming Fai · Inventors: Chan, Ming Fai; Woodward, David Frederick
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an intraocular pressure reducing method and composition wherein 11-acyl prostaglandins are contained in a pharmaceutically acceptable excipient for topical application to the surface of the eye.
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 July 17, 1990 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 17, 1990
GrantedOctober 24, 2000
Term endedJuly 17, 2010
Patent numberCA 2021316 C
Classification (IPC)A61K31/55
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.