Esters of thienobenzopyrans and thiopyranobenzopyrans
CA 1061345 A · Owner: Sharps Associates (A Partnership) · Inventors: Sheehan, John C.; Razdan, Raj K.; Pars, Harry G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel thienobenzopyran and thiopyranobenzopyran esters represented by the formla, wherein n is 0 to 3 and m is 0 to 3 and m + n = 2 or 3 R1 is lower alkyl, R2 is alkyl or cycloalkyl-lower alkyl hydrogen is hydrogen or lower alkyl, R5 is hydrogen or lower alkyl, and R3 is, wherein Y is a straight pr branched chain C1 to C8 alkylene R6 is hydrogen or a lower alkyl, a is an interger from 1 to 4, b is an interger from 1 to 4, X CH2 O, S or WR7 wherein, R7 is hydrogen or lower alkyl with the limitation that when, X is O, S or NR7 a and b each must be 2; and the acid addition salts thereof. The novel compounds are useful as one or more of ant-depressant, antianxiety, analgesic and anticonvulsant …
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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 August 28, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 1996.
- 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.