Photoconversion device
CA 2048467 C · Owner: Hashimoto, Seiji · Inventors: Shinohara, Mahito; Hashimoto, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photoconversion device comprises a plurality of cells 1 each having a bipolar type sensor element T the base of which is connected to a reset switch FET M and is also capacitively coupled to a control electrode. The device is read out by providing a positive pulse to the base of the sensor T through the control electrode, and is refreshed by a first operation in which the base is set to a preset level through the FET M and a second operation in which the base-emitter junction of the sensor T is forward biased. A control terminal 19 provides a high level reset voltage to a main electrode region of the FET M through an emitter follower arrangement 18 to turn the FET M on for the first reset …
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 August 6, 1991 and granted February 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2013.
- 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.