Electron beam tube arrangements
CA 2118350 C · Owner: E2V Technologies Limited · Inventors: Crompton, Timothy Allan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inductive output tetrode includes a cylindrical ceramic envelope 1 within which is located an electron gun including a cathode 2 and grid 3. A resonant input cavity surrounds the envelope 1 and is located adjacent the electron gun so as to provide a modulating electric field in the cathode-grid region during operation to produce density modulation of the electron beam. The cavity 7 is connected to two metal cylinders 10 and 14 arranged immediately adjacent to the outside of the envelope 1. Metallic portions 12 and 15 located within the envelope 1 are co-extensive with cylinders 10 and 14 with the material of the envelope 1 being located between them. These act as r.f. chokes to reduce …
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
- Filed October 18, 1994 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2016.
- 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.