Development of a light sensitive material containing diazo resin using an alkaline developer including water-softening agent
CA 1188144 A · Owner: Fuji Photo Film Co. Ltd. · Inventors: Hara, Tetsuo; Kita, Nobuyuki; Miyano, Shizuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A developer comprising a surfactant an organic, solvent, an alkali agent of about 0.01 to 5 wt% of a watersoftening agent having a sequestering ratio of at least 50% at the pH of the developer and water to remove the unexposed area of said photosensitive layer, and a method of development comprising imagewise exposing a photosensitive material comprising a support having thereon a light-hardenable photosensitive layer including an organic high-molecular polymer with an acid value of 10 to 200 and processing the, photosensitive material with the developer.
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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 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 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.