Multi-mode cavity for waveguide filters
CA 2196258 C · Owner: Bertin, Giorgio · Inventors: Accatino, Luciano; Bertin, Giorgio
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 band-pass filters. The cavity comprises a series of waveguide elements typically three and an iris or a waveguide segment. The iris or waveguide segment is arranged in a generically eccentric position with respect to the cavity and in particular to a main axis of the cavity. The cavity may be used to make narrowband filters for satellite communications. A filter comprising cavities according to the invention may be designed entirely using computer aided design and without a calibration procedure.
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 January 29, 1997 and granted June 13, 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
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.