Photolithographic element containing a silver- receptive polyaldehyde-containing receiving layer
CA 1180221 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Sanders, James F.; Kinderman, Gerard H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photolithographic sheet capable of forming a lithographic printing plate upon imaging via silver halide diffusion transfer comprising a support a silver halide, emulsion, and a receptor layer overlying the emulsion the, receptor layer comprising a high molecular weight hydrophilic polymer and catalytic nuclei for silver salt diffusion transfer development, the major proportion of the polymer being a polyaldehyde.
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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 January 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 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.