Peptide derivatives and their pharmaceutical use
CA 2010312 C · Owner: Anami, Koretake · Inventors: Hari, Hiroaki; Matsushita, Mutsuyoshi; Iwata, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Peptide derivatives of the following general formula wherein R1 and R2 are the same or different and respectively mean a hydrogen atom or a C1-5 alkyl group R3 and R4 are the, same or different and respectively mean a hydrogen atom or a C1-5 alkyl or phenyl, or R3 and R4 combinedly mean a C2-7 alkylene group, R5 and R6 are the same or different and respectively mean a hydrogen atom or a C1-5 alkyl group X, means -NH-, -O- or -CH2-, Y means -CH2- or -Sand m and n, respectively mean 0 or 1, provided that when X is -NH- or -Om is 1 and all of R1, R2, R3 and R4 do not mean a hydrogen atom at the same time; acid addition salts thereof; and pharmaceutical use thereof. Since the compounds and …
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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 February 19, 1990 and granted May 12, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2012.
- 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.