Dye image stabilizing aqueous solution containing a bismuth compound
CA 1265376 C · Owner: Kurematsu, Masayuki · Inventors: Kurematsu, Masayuki; Koboshi, Shigeharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dye image stabilizing aqueous solution for silver halide photographic materials which contains a watersoluble bismuth compound. The dye image produced by developing and bleaching or bleach-fixing an imagewise exposed silver halide photographic material.
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, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2007.
- 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.