Method of isolation for acoustic resonator devices
CA 2642731 C · Owner: Fetter, Linus Albert · Inventors: Barber, Bradley Paul; Fetter, Linus Albert; Zierdt, Michael George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of isolating acoustic resonator devices with a piezoelectric material interposed between two conductors on a substrate is disclosed. Growth of piezoelectric material is limited to specified regions on the substrate during fabrication. The specified regions form isolated islands of piezoelectric material which are subsequently interconnected.
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 2, 2001 and granted October 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 2, 2023.
- 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.