Cathode-ray tube
CA 1104632 A · Owner: Sony Corporation · Inventors: Ohkoshi, Akio; Matsumoto, Yoshio; Suzuki, Teruyasu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cathode-ray tube having an envelope consisting of a panel portion, a funnel portion and a neck portion with an electron gun mounted in the neck portion, has a phosphor coated on the interior surface of the panel portion to provide a screen and a conductive layer is coated on the interior surface of at least the funnel portion. In this invention, the conductive layer comprises a mixture of graphite, silicon carbide and silicate such as alkali silicate.
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 July 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 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.