Expired Canadian patentCanada
Semiconductive composition containing polymeric binder and a dye with quinoid benzene rings
CA 1074169 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Huffman, William A.; O'Leary, Kevin P.; Birkeland, Stepehn P.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel compositions which are constructed of an polymeric binder and a quinoid dye have semiconductive and photoconductive sensitivity due to the presence of the quinoid dyes.
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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 March 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 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.
Filed—
GrantedMarch 25, 1980
Term endedMarch 25, 1997
Patent numberCA 1074169 A
Classification (IPC)G03G5/04 +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.