Certain substituted 4-benzoyl-3,5-dioxotetrahydropyrans and thiopyrans
CA 1291761 C · Owner: Atkemix One Inc. · Inventors: Curtis, Jeff Kimo; Carter, Charles Garvie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CERTAIN SUBTITUTED 4-BENZOYL-3,5-DIOXOTETRAHYDROPYRANS AND -THIOPYRANS Abstract of the Disclosure, Compounds of the formula wherein, X is oxygen, sulfur or sulfonyl; R is halogen; C1-C2 alkyl; C1-C2 alkoxy; nitro; cyano; C1-C2 haloalkyl; or RaSOm- wherein m is 0 or 2 and Ra is C1-C2 alkyl; R1 is hydrogen or C1-C4 alkyl;, R2 is hydrogen or C1-C4 alkyl; or R1 and R2 together are alkylene having 2 to 5 carbon atoms; R3 is hydrogen or C1-C4 alkyl;, R4 is hydrogen or C1-C4 alkyl; or R3 and R4 together are alkylene having 2 to 5 carbon atoms; R5 and R6 independently are (1) hydrogen; (2) halogen; (3) C1-C4 alkyl; (4) C1-C4 alkoxy; (5) trifluoromethoxy; (6) cyano; (7) nitro; (8) C1-C4 haloalkyl; …
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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 November 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2008.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.