Phosphate ester derivatives, their preparation and their therapeutic use
CA 1322370 C · Owner: Iizuka, Yoshio · Inventors: Oshima, Takeshi; Nakamura, Norio; Sada, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Commpounds of formula (1):, (I) (wherein m is 2-4. A and B are oxygen or sulfur and one of R1 and R2 represents a long chain alkylcarbamoyl group and the other represents an ammonioakyl phosphate ester group) are PAF antagonists which may be used to treat asthma hypotension, inflammation and shock. They may be prepared by reacting the corresponding compound having a haloalkyl phosphate ester or alkylenephosphate ester group in place of the ammonioalkyl phosphate ester group with an appropriate amine.
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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 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 21, 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
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.