Photosensitive composition using maleic anhydride adduct of a 1,2,polybutadiene
CA 1054840 A · Owner: Japan Synthetic Rubber Co. · Inventors: Imaizumi, Fumitake; Nagaoka, Isao; Komatsu, Koei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photosensitive composition comprising (1) a maleic anhydride adduct of 1,2-polybutadiene having a molecular weight of 10,000 or higher (2) at least one photosensitizer and/or at least one photosensitive crosslinking agent, and if necessary, (3) at least one acrylic monomer. This composition can be developed with water or a polar solvent such as an alcohol, and its layer formed on a support provides a printing plate. When the acrylic monomer is contained, the composition is suitable for use in flexographic printing.
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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 May 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
- 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.