Pyrrolidine derivatives
CA 2001750 C · Owner: Hashimoto, Masashi · Inventors: Setoi, Hiroyuki; Tanaka, Hirokazu; Hashimoto, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There are described compounds of the, formula: wherein R1 is alkyl, ar(lower)alkyl which may have suitable substituent(s), or heterocyclic(lower)alkyl R2 is hydrogen or an acyl group, and, R3 is carboxy(lower)alkyl protected carboxy(lower)alkyl, carboxyaryl or protected carboxyaryl and pharmaceutically acceptable salts thereof. These compounds can be used for treating and/or preventing thrombotic diseases such as transient cerebral ischemic attack, cerebral apoplexy, unstable angina myocardial, infarction, peripheral circulatory insufficiency thrombus formation after percutaneous transluminal coronary angioplasty, disseminated intravascular coagulation syndrome or the like; allergic …
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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 October 30, 1989 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2011.
- 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.