Inhibitor-containing photohardenable compositions having improved resolution
CA 2033599 A1 · Owner: Blanchet-Fincher, Graciela B. · Inventors: Chang, Catherine T.; Blanchet-Fincher, Graciela B.; Blanchet-Fincher, Graciela B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Photohardenable electrostatic master with improved environmental latitude and dot shape comprising (1) an electrically conductive substrate and, coated thereon, (2) a layer of photohardenable composition having a speed that requires an exposure energy in the range of 3 to 90 mjoules/sq. cm. consisting essentially of, (a) at least two incompatible organic polymeric binders, (b) at least one monomeric compound having at least one ethylenically unsaturated group and, (c) a photoinitiator or photoinitiator system that activates polymerization of the, ethylenically unsaturated monomer upon exposure to actinic radiation, (d) a chain transfer agent and, (e) at least one polymerization inhibitor in …
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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 January 4, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2013.
- 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.