Photographic materials and colour proofing system
CA 1270141 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Fisher, Michael G.; Kitchin, Jonathan P.; Penfound, Keith A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radiation-sensitive element for half tone colour proofing adapted to be exposed by scanning with four independently modulated sources of radiation emitting at different wavelengths within the range 550 to 900 nm, the element comprising a substrate bearing at least four separate imaging media coated thereon said imaging media including:, (1) an imaging medium capable of forming a yellow image upon imagewise exposure and processing, (2) an imaging medium capable of forming a magenta image upon imagewise exposure and processing, (3) an imaging medium capable of forming a cyan image upon imagewise exposure and processing, and, (4) an imaging medium capable of forming a black or a balancing …
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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 June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
- 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.