Azo dye compounds
CA 1092099 A · Owner: Eastman Kodak Company · Inventors: Rossi, Louis J.; Ford, John A. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Dye compounds having the formula:, wherein: R1 is H, COOH, CONH2, -HgSO2NH2, -SO2NH2 or -SO3M where M is Na+ or NH4;, R2 is a lower alkoxy radical -OCH2CONH2, or, where each of R6 and R7 is a lower alkyl radical; R3 is H, a lower alkyl radical, a lower alkoxy radical or NO2, R4 is H or, ;, where m is 0 or 1 n is 1 when m=0 and 2 when m=1;, Q is OH when m=0 and O- when m=l; and J is a metal cation such as Zn, Cd, Sn or the like. -1-
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 December 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 1997.
- 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.