Apparatus and method for manufacturing a screen assembly for a crt utilizing a grid-developing electrode
CA 2067392 C · Owner: Friel, Ronald Norman · Inventors: Van Raalte, John A.; Friel, Ronald Norman; Stewart, Wilber Clarence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for electrophotographically manufacturing a luminescent screen assembly on a substrate (18), for use within a CRT includes a developer for developing a photoconductive layer (34) having , a latent image thereon, with dry-powdered trib-, oelectrically-charged screen structure materials (48 48'). The , photoconductive layer (34) overlies a conductive layer (32) in contact with the substrate (18). A grid-developing electrode (44) is located at a distance from the photoconductive layer that is large relative to the smallest dimension of the latent image. The electrode is biased with a suitable potential, to influence the deposition of the charged screen structure materials onto …
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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 September 18, 1990 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2012.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.