4-amino-tetrahydro-2-naphthoic acid derivatives
CA 1237442 A · Owner: Welfide Corporation · Inventors: Arita, Masafumi; Kuroda, Tsuyoshi; Tahara, Tetsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
YO-1-34888C/NK/84. ABSTRACT, 4-Amino-1,2,3,4-tetrahydro-2-naphthoic acid derivative of the formula:, wherein X is halogen atom n is 1 or 2, R1 is hydroxy, group, lower alkoxy group or amino group and R2 is, hydrogen atom, lower alkanoyl group or carbamoyl group or their salts, which are useful as hypotensive diuretic.
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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- 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.