Multi-mode cavity for waveguide filters, including an elliptical waveguide segment
CA 2196257 C · Owner: Accatino, Luciano · Inventors: Bertin, Giorgio; Accatino, Luciano
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-mode cavity for waveguide filters. The cavity comprises at least one waveguide segment with an elliptical cross-section. The axes of the waveguide segment are arranged at a given inclination angle with respect to the polarization of the incident TE field to provide a dual-mode cavity, with the ability to resonate two transverse fields (TE) with polarization planes orthogonal to each other. By adding an additional waveguide element to introduce a non-axial discontinuity a triple-mode cavity is obtained, thereby allowing for an additional longitudinal mode to resonate.
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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 January 29, 1997 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2019.
- 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
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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.