Thiol-carboxylic acid derivatives
CA 1322073 C · Owner: Markwell, Roger E. · Inventors: Smith, Stephen A.; Markwell, Roger E.; Hughes, Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel compounds of the formula (I) processes for their, preparation and their use as collagenase inhibitors are described:, (I), in which R1 is hydroxy; alkoxy; aryloxy; aralkyloxy; -NR6R7 where R6 and R7 are hydrogen or alkyl or R6 and, R7 together with the N-atom to which they are bonded form a 5- to 7-membered ring with an optional heteroatom; -NHCH(R8)COR9 where R8 is hydrogen; alkyl optionally substituted by hydroxy, alkoxy -NR6R7, quanidine, CO2H, CONH2, SH, or S-alkyl; or CH2-AR where Ar is optionally substituted aryl; and R9 is hydroxy alkoxy or -NR6R7. R2 is hydrogen or acyl. R3 is C3-6 alkyl. R4 is hydrogen; alkyl; -CH2R10 where R10 is optionally substituted phenyl or heteroaryl; …
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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 September 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 7, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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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.