Color development composition and method of processing silver halide colour photographic material using the same
CA 2093609 C · Owner: Sigemori, Nobuki · Inventors: Sigemori, Nobuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to color developer compositions used for processing silver halide color photographic material and also to a method of processing silver halide color photographic material using the same. More specifically the invention relates, to color developer compositions which are excellently stable in, use as color developer solution and provide for satisfactory environment of use, and also a method of processing silver halide color photographic material using the same.
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
- Filed April 7, 1993 and granted October 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2015.
- 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.