Segmented shadow mask support structure and process for flat tension mask color cathode ray tubes
CA 2067111 C · Owner: Zenith Electronics Corporation · Inventors: Greiner, Siegfried M.; Capek, Raymond G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A color cathode ray tube (20) is disclosed that includes a glass faceplate (24) having on its inner surface (26) a centrally disposed, rectangular screen (28). On each of opposed sides of the screen (28) is a plurality of discrete ceramic mask support segments (48) to which is secured a tensed foil shadow mask (50). A process for fabrication is also disclosed.
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 October 17, 1990 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 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.