Semiconductor sensor
CA 2067180 C · Owner: Schlumberger Sa · Inventors: Suski, Jan; Mosser, Vincent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to field effect semiconductors sensors. The sensor according to the invention is comprised of a ring oscillator (3) consisting of an odd number of CMOS reversers and arranged in an area (2) which is sensitive to the physical magnitude to be measured. In order to increase the sensitivity of the sensor for each CMOS reverser, the channel n of the NMOS transistor is arranged perpendicularly to the channel p of the PMOS transistor.
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 October 15, 1990 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.