Process for preparing surprint proof on a pearlescent support
CA 1250780 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Adolphson, Douglas G.; Johnson, Van B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Process For Preparing Surprint, Proof On A Pearlescent Support Abstract Of Invention, Process for preparation of improved surprint multilayer proof using at least three nonsilver photoimaged elements, e.g. positive-working photopolymerizable element or negative-working photosensitive element, having a thickness greater than 0.0001 inch (0.0025 mm) which are laminated sequentially to a pearlescent support having total luminous transmission not in excess of 25% and 20° specular gloss in the range of 8 to 20 gloss units e.g. biaxially oriented polyethylene terephthalate film filled with polypropylene and BaSO4. The surprints are useful in the web fed, publication web and sheet fed …
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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 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 7, 2006.
- 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.