Phenylalanine derivative and proteinase inhibitor
CA 1297633 C · Owner: Okamoto, Shosuke · Inventors: Okunomiya, Akiko; Okada, Yoshio; Yamada, Morihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
y, PHENYLALANINE DERIVATIVE AND, PROTEINASE INHIBITOR ABSTRACT OF THE DISCLOSURE, A phenylalanine derivative having the formula (I): (I), where R1 and R2 are independently hydrogen provided that both R1 and R2 are not hydrogen at the same time;, C1-C8 alkyl which may be substituted with hydroxy, hydroxycarbonyl, C1-C4 alkoxycarbonyl C1-C4 alkylmercapto, C1-C4 alkoxy, carbamoyl sulfamoyl, pyridyl, or phenyl which may further be substituted with nitro, C1-C4 alkoxy, or halogen; C6-C8 cycloalkyl which may be substituted with hydroxy, C1-C4 alkoxy, hydroxylcarbonyl C1-C4, alkoxycarbonyl, or C1-C4 alkyl; phenyl which may be substituted with, halogen nitro, trifluoromethyl, C1-C4 alkoxy, C1-C4 …
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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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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.