Expired Canadian patentCanada
Cathode ray tube having improved shadow mask
CA 1088988 A · Owner: Rca Corporation · Inventors: Morrell, Albert M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A shadow mask type of cathode ray tube is improved by corrugation of the mask and support of the corrugated mask at points of inflection at the edges of the mask. -1-
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 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 30, 1978
GrantedNovember 4, 1980
Term endedNovember 4, 1997
Patent numberCA 1088988 A
Classification (IPC)H01J29/07
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.