Canadian application, no grantCanada
Color picture tube having an improved internal magnetic shield
CA 2055983 A1 · Owner: D'Amato, Ralph James · Inventors: D'Amato, Ralph James
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal magnetic shield for a color picture tube has lower reluctance in the sides of the shield than in the top and bottom of the shield.
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 November 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 21, 1991
GrantedNo grant recorded
Term endedNovember 21, 2011
Patent numberCA 2055983 A1
Classification (IPC)H01J29/06
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.