Resonator cavity end wall assembly
CA 2263218 C · Owner: The Boeing Company · Inventors: Goetschel, Daniel B.; Gray, Devon J.; Kich, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electromagnetic resonator (10) comprises a waveguide body (12) having a generally tubular side wall (14) and a pair of end wall assemblies (18). The end wall assembly (18) includes a bowed aluminum plate (22) and an INVAR disk (24) attached to one another at the periphery thereof. The INVAR disk (24) includes a relatively thick outer annular portion (30) and a relatively thin inner circular portion (32). The bowed aluminum plate (22) bows in response to increased temperature thereby counteracting expansion of the waveguide body (12).
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 26, 1999 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2021.
- 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.