Expired Canadian patentCanada
Isocyano group containing polymethine dyes and imaging compositions
CA 1311482 C · Owner: Logan, Margaret Elizabeth · Inventors: Logan, Margaret Elizabeth
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Polymethane dyes are disclosed containing an acidic electron accepting terminal nucleus comprised of an isocyano group. The dyes are useful as spectral sensitizers in ultraviolet responsive imaging compositions.
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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 December 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 7, 1988
GrantedDecember 15, 1992
Term endedDecember 15, 2009
Patent numberCA 1311482 C
Classification (IPC)C09B23/16 +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.