Process for preparing an overcoated photopolymer printing plate
CA 1184077 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Munger, Stanley H.; Gruetzmacher, Robert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for preparing flexographic photopolymer elements by passing into the nip of a calender a photopolymer composition mass comprising elastomeric binder, monomecic compound and, photoinitiator and calendering the photopolymer composition either between (1) a support and multilayer cover element consisting e??entially of a flexible cover film, optionally a flexible polymeric film, e.g. polyamide, and a layer of elastomeric composition which is photosensitive or becomes photosensitive during or after calendering or, between (2) two supports, one of which is removed prior to contact, e.g. by lamination or pressing with the multilayer cover element. The flexographic photopolymer elements …
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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 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2002.
- 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.