Expired Canadian patentCanada
Photoconductive imaging members with unsymmetrical squaraine compositions
CA 1319704 C · Owner: Law, Kock-Yee · Inventors: Law, Kock-Yee; Bailey, Frank Courtney
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Unsymmetrical squaraine compounds such as substituted dialkylaminophenylalkoxyaryl squaraines and imaging members, comprised of the aforementioned squaraines.
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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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 10, 1989
GrantedJune 29, 1993
Term endedJune 29, 2010
Patent numberCA 1319704 C
Classification (IPC)C07C217/80 +2 more
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.