PHOTOGRAPHIC COLOUR DEVELOPER COMPOSITION CONTAINING AN .alpha.-AMINO CARBONYL ANTIOXIDIZING AGENT
CA 1135554 A · Owner: Agfa-Gevaert Aktiengesellschaft · Inventors: Melzer, Arnfried; Frank, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A colour developer composition is provided which has substantially improved protection against oxidation of the colour developer and excellent sequestering properties characterised in that the composition comprises an .alpha.-aminocarbonyl compound, an organo-phosphonic acid and an aminocarboxylic acid. A-G 1505
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 November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.