Method of processing presensitized lithographic printing plate
CA 2019632 A1 · Owner: Watanabe, Sinya · Inventors: Shimura, Kazuhiro; Watanabe, Sinya; Uehara, Masafumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of processing presensitized lithographic printing plate, Disclosed is a method of processing a presensitized lithographic printing plate by the use of an automatic processor, comprising processing a negative working presensitized lithographic printing plate containing a diazo compound and a positive working presensitized lithographic printing plate containing an o-quinonediazide compound, with a developer solution capable of processing the negative working presensitized lithographic printing plate and the positive working presensitized lithographic printing plate in common, repeatedly used under supply of a developer replenishing solution, wherein; the developer solution and the …
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
- Filed June 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 2012.
- 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.