Carbacylin derivatives
CA 1251202 A · Owner: Sankyo Company, Limited · Inventors: Kojima, Koichi; Kobayashi, Shinsaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbacyclin derivatives with anti-ulcer activity comprise compounds of the general formula (I): (I), (wherein R1 is selected from the group consisting of a hydrogen atom and an alkyl group having from 1 to 10 carbon atoms: R2 is selected from the group consisting of a hydrogen atom and a methyl group; and R3 is selected from the group consisting of a 3-butenyl group a 4-pentenyl group and a 5-methyl-4-hexenyl group) and, pharmaceutically acceptable salts thereof.
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
- Granted March 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 14, 2006.
- 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.