Electron beam tubes
CA 2556283 C · Owner: Aitken, Steven · Inventors: Wheelhouse, Alan Edward; Bardell, Stephen; Aitken, Steven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A linear electron beam tube comprises an electron gun (10) having a cathode and (12) a grid (13), and an anode (27) arranged in a first portion (24) of a drift tube (22). The drift tube is within a vacuum envelope (20) and has first and second portions (24, 26) separated by a gap (28) at which point an electron beam, density modulated with an input RF signal is inductively coupled to an output cavity (30). The vacuum envelope is partially defined by a cylindrical ceramic wall (18) and a pair of ferromagnetic pole pieces (14 16) at its ends that form a DC magnetic circuit. The pole pieces extend radially beyond the vacuum envelope. At least those parts of the surface of the pole …
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 February 22, 2005 and granted January 28, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.