Colour television display tube
CA 1112282 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Barten, Piet G.J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 8874, ABSTRACT:, Colour television display tube of the shadow mask type with phosphor lines. In connection with the unequal centre distances between the central electron spot and the two outermost electron spots of a triplet as a result of the properties of the deflection coils, the width of the phosphor lines is chosen to be so that the electron spots in the case of mislanding simultaneously cross the edge of the phosphor lines. As a result of this the "white-remains-white" effect is obtained. The intermediate spaces between the phosphor lines of a triplet are preferably equal which, facilitates the inspection of the screens during the manufacture. -10-
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 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 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.