Microwave integrated circuit using a distributed line with a variable effective length
CA 2009405 C · Owner: Shiga, Nobuo · Inventors: Shiga, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In this invention, a distributed constant line on a microwave IC is formed of a Schottky metal and a, semiconductor conductive layer contacting the distributed constant line at least at one position and an ohmic contact electrode contacting the semiconductor conductive layer are arranged. According to this invention, characteristics of ICs can be optimized against a variation in elements combined with a circuit comprising the distributed constant line after the manufacture of ICs.
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 February 6, 1990 and granted November 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 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.