Overlay color proofing film
CA 1321728 C · Owner: Barton, Oliver A. · Inventors: Barton, Oliver A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A color proofing film comprising a substantially transparent polyester base film which is provided with a transparent coating and furthermore is coated on either side with a photosensitive layer comprising a resinous polymer binder a, colorant and a photosensitive composition wherein said trans-, parent coating is comprised of a transparent layer comprising aluminum oxide and, disposed thereon, a transparent layer comprising magnesium fluoride. Hoe 85/K 108
Read the whole patent
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 August 31, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 31, 2010.
- 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.