Absolute pressure transducer and method for making same
CA 1320847 C · Owner: Mathias, Milton W. · Inventors: Wilda, Douglas W.; Mathias, Milton W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Patent Case No. I1104362-U.S. APPLICATION FOR AN ABSOLUTE PRESSURE TRANSDUCER AND, METHOD FOR MAKING SAME MILTON W. MATHIAS AND, DOUGLAS W. WILDA ABSTRACT, An absolute pressure transducer includes a hollow glass tube supporting across one end thereof a differential pressure responsive semiconductor plate having piezoresistive elements diffused therein and an evacuated sealed chamber within the tube exposed to the plate. A method for making the transducer and providing the evacuated chamber within the tube adjacent to the plate includes the steps of mounting the plate across the end of the tube to form a first fluid-tight seal therewith inserting a loose, glass plug within the tube to define …
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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
- Granted August 3, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 3, 2010.
- 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.