Tetrahydrocarbazole 1-alkanoic acids
CA 1299577 C · Owner: Yoakim, Christiane · Inventors: Yoakim, Christiane; Gillard, John W.; Guindon, Yvan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tetrahydrocarbazole 1-alkanoic acids are disclosed. The compounds act as prostaglandin and thromboxane antagonists and are useful in treating asthma, diarrhea, hypertension, angina platelet, aggregation, cerebral spasm, premature labor spontaneous abortion and dysmenorrhea and as cytoprotective agents, and have the following general formula:, I, wherein:, R1, R2, R3, R4, R5 and R6 are each independently selected from:, (1) hydrogen; (2) alkyl having 1 to 6 carbon atoms;, (3) alkenyl having 2 to 6 carbon atoms; (4) -(CH2)nM, wherein n is O to 3 and M is a) OR13;, b) halogen;, c) CF3;, d) SR13; e) phenyl or substituted phenyl, wherein substituted phenyl i s as defined below in the, definition …
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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 April 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 2009.
- 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
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.