Apparatus and method for sensing intravascular pressure
CA 2006177 A1 · Owner: Marsh, Wilbert I. Jr. · Inventors: Rose, Luke E.; Marsh, Wilbert I. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure sensor assembly is provided for placement within the tip of a conventional catheter or the like for insertion into a small cavity such as a human coronary artery. The pressure sensor assembly is comprised of device and backing dies of crystalline material bonded together without the use of a bonding material, thereby providing direct contact between the two crystalline dies. A diaphragm is etched into one of the dies before it is bonded to the other die. A cavity formed by the diaphragm when the two dies are bonded is vented to a reference atomosphere by a channel or groove in the backing die. During the fabrication of the sensor assembly small holes are etched completely through …
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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 December 20, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- 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.