Dielectric resonator filter
CA 2115397 A1 · Owner: Parker, John Raymond · Inventors: Parker, John Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dielectric resonator filter including at least one microwave resonator having a cylindrical conductive cavity symmetrically disposed about a longitudinal axis and an internally projecting flange; a cylindrical dielectric resonator element; and a unitary dielectric support member for the resonator element the support member having a, coefficient of thermal expansion to match that of the resonator element and being secured to the said internally projecting flange and adapted to support the resonator element, at the peripheral surface thereof in a spacial central position within the cavity whereby the longitudinal axes of the cavity and the resonator element are coaxial. The support member …
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 10, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2016.
- 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.