X-ray image intensifier tube
CA 1114525 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Beekmans, Antonius A.G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An image-forming device, comprising an image intensifier tube, includes a screening grid with ferromagnetic material which is arranged near the entrance window of the image intensifier tube for the purpose of screening against disturbing magnetic fields. Due to the use of partly radiation absorbing material and partly ferromagnetic material this screening grid can replace, a stray radiation grid already present in the device, or can be added as a grid with radiation transmitting material and ferromagnetic material without the image formation being disturbed in any way. - 14 -
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 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 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.