Dampening water composition for lithographic printing and method for lithographic printing
CA 2053554 A1 · Owner: Fuji Photo Film Co. Ltd. · Inventors: Kunichika, Kenji; Uchida, Toshio; Matsumoto, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dampening water composition for lithographic printing plate comprises a hydrophilic polymer having a film-forming ability, a pH-buffering substance and at least one compound selected from the group consisting of benzimidazole and derivatives thereof. The dampening water composition can effectively suppress the corrosion of copper or copper alloyplated rolls of a printing press as well as cast iron or nickelplated cast iron parts thereof without impairing printing effects and printability. 24
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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
- Filed October 16, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2013.
- 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.