Oxime-carbamates and oxime-carbonates as bronchodilators and anti-inflammatory agents
CA 2048518 A1 · Owner: American Home Products Corporation · Inventors: Lombardo, Louis John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, There are disclosed compounds of the formula wherein, ;, R1 is hydrogen, lower alkyl or ;, a is 1-3;, b is 1-3;, c is 0-2;, X, Y and Z are each independently, a bond, O, S or NH, with the proviso that if one of X or Y is O, S or NH, the other must be a bond; R2 is amino, loweralkylamino, arylamino loweralkoxy or aryloxy;, R3 is hydrogen halo, hydroxy, lower alkoxy, aryloxy, loweralkanoyloxy amino, lower alkylamino, arylamino or loweralkanoylamino; R4 and R5 are each, independently hydrogen or lower alkyl; m is 0-4;, n is 1-4; and, o is 1-4;, and which by virtue of their ability to selectively inhibit an isoenzyme of 3':5'-cyclic AMP phosphodiesterase located in …
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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
- Filed August 7, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2013.
- 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.