Recording materials
CA 1255903 A · Owner: Fuji Photo Film Co. Ltd. · Inventors: Ikeda, Kensuke; Satomura, Masato; Iwakura, Ken
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A recording material containing an electron donating leuco dye and an electron accepting compound wherein said electron accepting compound is s salicylic acid derivative having an alkyl group, an alkoxy group or an aryloxy group as a substituent or a metal salt thereof. The recording material has satisfactory color developability, working preservability and stability.
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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.