Polyene compounds
CA 1114830 A · Owner: Hoffmann-La Roche Limited · Inventors: Loeliger, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polyene compounds of the general formula (I), wherein R1 and R2 each represent a hydrogen or halogen atom or a lower alkoxy group R3, R4, R5 and R6 each represent a hydrogen atom or a lower alkyl group, R7 represents a hydroxymethyl, lower alkoxymethyl, lower alkanoyloxymethyl, carboxyl, lower alkoxycarbonyl, mono(lower alkyl)carbamoyl or di(lower alkyl)carbamoyl group and n stands for 1 or 2 suitable for the topical and systemic therapy of neoplasms and dermatoses are prepared.
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 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
- 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.