Heat-sensitive recording material
CA 1063348 A · Owner: Agfa-Gevaert Naamloze Vennootschap · Inventors: Claeys, Daniel A.; Dierckx, Jozef A.; Lemahieu, Raymond G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermographic recording process in which a dye is produced by bringing image-wise into reactive contact with the aid of heat an acid-reacting compound with a dye precursor compound corresponding to the following general formula : X - Ar - CH = N - R1, wherein :, Ar represents a bivalent aromatic nucleus R1 represents an aryl group including a substituted aryl group and, X represents a , group wherein each of R2 and R3 (same or different) represents an alkyl group a cycloalkyl group, an aralkyl group, or an aryl group including said groups in substituted form or R2 and R3 together represent the necessary atoms to close a nitrogencontaining heterocyclic nucleus.
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 October 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 2, 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
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.