Novel nonlinear optical arylhydrazones and non linear optical polymers thereof
CA 2132870 A1 · Owner: Gulotty, Robert J. · Inventors: Bales, Stephen E.; Haag, Anthony P.; Gulotty, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to nonlinear optical material comprising nonlinear optical dihydroxy arylhydrazones and to nonlinear optical materials comprising compositions containing at least one divalent moiety of nonlinear optical arylhydrazones. The present invention also relates to polyesters polyestercarbonates, polycarbonates, polyethers and poly(hydroxy ether) polymers, incorporating the dihydroxy arylhydrazone as recurring divalent moeities in the backbone of the polymer. The polymeric compositions of the present invention have high glass transition temperatures and exhibit stable nonlinear optical activity at high temperatures over a period of time.
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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
- Filed March 10, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2015.
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Timeline
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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.