Color picture tube having improved slit type shadow mask and method of making same
CA 1138517 A · Owner: Rca Corporation · Inventors: Nolan, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RCA 72,203, Abstract, A color picture tube having a slit type apertured mask, wherein the slit apertures are arranged in columns and the apertures in each column are separated by webs is, improved by constructing the mask with portions of full thickness and portions of reduced thickness. The portions of full thickness consist of strips between the aperture columns and islands at the webs. The strips and islands are separated from each other by the portions of reduced thickness. The cross-sectional area of each web is substantially uniform across the web.
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 December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 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.