Inductively coupled saw device and method for making the same
CA 2068513 C · Owner: Smith, Richard D. · Inventors: Smith, Richard D.; Nagel, Jon L.; Nysen, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A surface acoustic wave (SAW) device (10) includes a SAW substrate having an exposed surface; and at least one SAW, transducer (14) disposed on said surface of said substrate; for converting between electrical energy and SAW energy that traverses said surface along at least one acoustic path. A conductive loop (22); disposed an said surface of the substrate; is electrically connected at its ends to the transducer. The conductive loop thus forms an inductive element for coupling energy into and out of said SAW device.
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 November 13, 1990 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2012.
- 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.