Cathode ray tube having an fe-co-cr shadow mask and method of manufacturing such a shadow mask
CA 1208686 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Van Roosmalen, Johannes T.C.; Klomp, Johannes T.; Brouha, Marcel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cathode-ray tube having an Fe-Co-Cr shadow mask and method of manufacturing such a shadow mask." A cathode ray tube of the post-focusing type comprising colour selection means in the form of a ferromagnetic plate having a large number of apertures. The plate is magnetized so that a magnetic quadrupole lens is formed in each aperture. The ferromagnetic plate consists of an Fe-Co-Cr alloy having 25 - 27% by weight of Co and the remainder essentially Fe.
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 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2003.
- 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.