Expired Canadian patentCanada
Carboxyalkyl peptide derivatives
CA 1284850 C · Owner: Mccullagh, Keith Graham · Inventors: Hann, Michael Menteith; Mccullagh, Keith Graham; Wadsworth, Harry John
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel carboxyalkyl peptide derivatives of the formula I, and particularly a compound of the formula: are collagenase inhibitors and are useful in the treatment of rheumatoid arthritis.
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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
- Granted June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 25, 1984
GrantedJune 11, 1991
Term endedJune 11, 2008
Patent numberCA 1284850 C
Classification (IPC)C07K5/04 +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.