7-oxabicyclo(2.2.1)heptane-based derivatives
CA 1294972 C · Owner: Varma, Ravi K. · Inventors: Varma, Ravi K.; Gordon, Eric M.; Chao, Sam T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
7-OXABICYCLO(2.2.1)HEPTANE-BASED DERIVATIVES 7-Oxabicyclo(2.2.1)heptane-based N-hydroxy- N-alkyl (or aryl) ureas, carbamic acids and carbamothioic acids are disclosed having the general formula, wherein R1 is hydrogen lower alkyl, alkenyl, aryl, or aralkyl; R2 is hydrogen lower alkyl, aralkyl, alkanoyl or aroyl; R3 is lower alkyl alkenyl or, alkynyl; A is -CH2-C=CH- or a single bond; X is oxygen, sulfur or NH; n is an integer from 1 to 8; and all stereoisomers thereof. These new compounds have been found to simultaneously inhibit the enzymes arachidonic acid cyclooxygenase and arachidonic acid 5-lipoxygenase and are therefore useful as antiinflammatory antiasthma and antipsoriatic agents.
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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 January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 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.