Dihydrobenzofuran and related compounds useful as anti-inflammatory agents
CA 2244402 C · Owner: The Procter & Gamble Company · Inventors: Janusz, John Michael; Ridgeway, James Madison Ii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound having structure (I) wherein (a) n is from 1 to about 3; (b) X is selected from the group consisting of O S, SO, or SO2; (c) Y is independently hydrogen or straight, branched or cyclic alkyl having from 1 to about 4 carbon atoms, or the Y's are bonded together to form an alkanyl ring having from about 3 to about 7 atoms; (d) Z is hydrogen or straight branched or cyclic , alkyl having from 3 to about 10 atoms other than hydrogen; (e) R1 is hydrogen or straight, branched or cyclic alkyl, aryl or C(=NH)-NHR4; and (f) R2 R3 and , R4 are independently hydrogen straight, branched or cyclic alkyl having from one to 10 carbon atoms or aryl, R2 or R3 may be bonded together to form a …
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 January 30, 1997 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2019.
- 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.