Intra-or intermolecular disulfide of cysteine derivatives
CA 1162188 A · Owner: Santen Pharmaceutical Co. Ltd. · Inventors: Oya, Masayuki; Iso, Tadashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Intramolecular disulfide of formula I and intermolecular disulfide of formulas II and III of cysteine derivatives (I), (II), (III), wherein R1 is (C1-C6) alkyl and A is straight or branched alkylene containing 1 to 3 carbon atoms, and the pharmaceutically acceptable salts thereof. Compounds of this invention are useful for therapeutic agent for liver damage, rheumatic disease cataract, and immuni-mediated diseases.
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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 February 14, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2001.
- 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.