Prostaglandin e analogues
CA 2384148 A1 · Owner: Tanami, Tohru · Inventors: Tanami, Tohru; Yagi, Makoto; Ono, Naoya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Prostaglandin analogues represented by general formula (I) pharmaceutically , acceptable salts thereof or hydrates of both: wherein A is ethylene vinylene , or ethynylene; Y1 and Y2 are each independently hydrogen halogeno, cyano, CONR3R4 (wherein R3 and R4 are each independently hydrogen or C1-6 alkyl or , R3 and R4 together with the nitrogen atom adjacent thereto may form C4-8 cyclic amine), C1-3 aminoalkyl, C1-6 hydroxyalkyl NR5R6 (wherein R3 and R4 , are each independently hydrogen or C1-6 alkyl) hydroxyl, C1-6 alkoxy, C1-9 , alkyl, C1-6 haloalkyl C1-5 acyl, or COOR7 (wherein R7 is hydrogen C1-6 , alkyl, or phenyl); R1 and R2 are each independently hydrogen halogeno, C1-9 , alkyl, or …
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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 September 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2022.
- 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.