Crt screen structure produced by photographic method
CA 1111698 A · Owner: Rca Corporation · Inventors: Pearlman, Samuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing a luminescent-screen structure for a cathode-ray tube comprising (a) exposing a water-soluble photopolymeric film to a light image to insolublize selected portions of the film (b) developing the exposed film by flushing the exposed film with an aqueous medium to remove the still-soluble portions of the film, (c) rinsing the retained film regions with an aqueous solution containing borate ions, (d) overcoating the retained film regions with a layer containing particles of screen-structure material (d) and then developing the overcoating by removing the retained film regions and the overcoating thereon.
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
- Granted November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.