Cathode ray tube
CA 1135776 A · Owner: Koninklijke Philips Electronics N.V. · Inventors: Van Roosmalen, Johannes H.T.; Vrijssen, Gerardus A.H.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
28-3-1979 1 PHN 9195, ABSTRACT:, "Cathode ray tube". In a cathode-ray tube in particular a camera, tube, the inner wall of the glass envelope is coated with an electrically conductive material. In order to form separate wall electrodes, said wall coating is interrupted in the proximity of electrodes extending transversely to the wall coating. These electrodes extending transversely to the wall coating are supported by a supporting surface extending transversely to the longitudinal axis of the tube. At the area of each of the interruptions the envelope has a stepwise decrease of the inside diameter in two steps. In the direction of decreasing diameter the first of these steps constitutes the …
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 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.