Novel heterocyclic compound and medicinal use thereof
CA 2448634 A1 · Owner: Azukizawa, Satoru · Inventors: Yoshimi, Akihisa; Kasai, Masayasu; Azukizawa, Satoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel heterocyclic compound which is either one represented by the formula (I): (I) {wherein R1 represents hydrogen or C1-6 alkyl; R2 represents hydrogen, -CO-C(R4)=C(R4)-R5 (wherein R4 is hydrogen or C1-4 alkyl and R5 is C4-8 alkyl, C2-8 alkenyl, etc.), etc.; Y represents a group represented by (II) wherein X is oxygen or sulfur; R7 has the same meaning as R4; R8 is R10- C(R9)=C(R9)- (wherein R9 has the same meaning as R4 and R10 is C3-6 alkyl etc.), etc.; R14 has the same meaning as R4; and R15 represents aryl etc.; Y-, (CH2)n-O- is bonded to the 6- or 7-positon carbon atom of the tetrahydroisoquinoline skeleton; and n is an integer of 1 to 4} or a pharmaceutically acceptable salt …
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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 May 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2024.
- 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.