Azo magenta dye-providing compounds
CA 1047821 A · Owner: Eastman Kodak Company · Inventors: Landholm, Richard A.; Haase, Jan R.; Krutak, James J. (Sr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel azo magenta dye-providing compounds and photographic elements containing such compounds are described. the present compounds contain a carrier moiety which, as a function of oxidation under alkaline conditions, provides a substance having a mobility different that that of the starting compound.
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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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.