Polymers and photographic elements containing same
CA 1057994 A · Owner: Eastman Kodak Company · Inventors: Ponticello, Ignazio; Koeng, Frederich; Cohen, Hyman L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of Disclosure, A water-insoluble polymeric mordant is described which comprises repeating units at least 1/3 of said repeating units having the formula:, wherein R1 and R2 are hydrogen atoms or alkyl groups containing 1 to 6 carbon atoms and R3, R4 and R5 are alkyl groups containing 1 to 20 carbon atoms wherein the total number of carbon atoms in R3, R4 and R5 typically is at least 12 and X? is an anion. Mordants of this type are useful in photographic elements. -1-
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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 July 10, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 10, 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
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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.