Benzoquinone derivatives, their production and use
CA 1312086 C · Owner: Imada, Isuke · Inventors: Watanabe, Masazumi; Imada, Isuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
24205-665, Abstract of the Disclosure, Compounds of the formula: wherein ? is an integer of 0 to 18, X is hydrogen an alkyl, having 1 to 4 carbon atoms or a carboxylic acyl having 2 to 4 carbon atoms and Y is a phenylene, a cycloalkylene having 3 to 7 carbon atoms or a group of the formula: in which m is an integer of 0 to 3, and R1 and R2 each is an alkyl having 1 to 4 carbon atoms, are novel compounds possess circulatory disturbance-improving activity and inhibitory activity of the generation and release of SRS-A, and used for prophylactic or therapy of ischemic diseases such as cerebral apoplexy or allergic diseases. 541361
Read the whole patent
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 December 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.