Colour-photographic recording material
CA 1203410 A · Owner: Ciba-Geigy Investments Ltd. · Inventors: Rody, Jean; Leppard, David G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Colour-photographic recording material Abstract, A colour-photographic recording material which in at least one light-sensitive silver halide emulsion layer, an interlayer and/or a protective layer contains, a stabiliser mixture comprising i) a compound with at least one group of the formula (I), or a polymer with recurring structural units of the formula I, and, ii) a phenolic antioxidant. Colour images obtained by imagewise exposure and development of this colour-photographic recording material show good stability to the action of visible and ultraviolet light. With respect to the definitions of the substituents in formula I, reference is made to the description.
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 April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
- 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.