A microwave diplexer arrangement
CA 2270616 C · Owner: Alcatel · Inventors: Pelz, Dieter; Trembath, Natalie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adjustable microwave diplexer comprising two combline filter sections (A and B). Each filter section has at least three tunable resonator elements (1,2,3 and, 4). Non-adjacent resonator elements of one section (A) are inductively coupled by, an adjustable coupling element (20,21) and non-adjacent resonator elements of the other section (B) are capacitively coupled by an adjustable capacitor element, (31). This arrangement provides the means to achieve adjustable transmission zeros above the passband of filter A and below the passband of filter B to provide, the diplexer with two highly selective filters.
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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 May 3, 1999 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.