Hybrid circuits and thick film dielectrics used therein
CA 2000680 A1 · Owner: Corning Incorporated · Inventors: Martin, Francis W.; Francis, Gaylord L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a hybrid circuit embodying a crossover formed on a low expansion substrate of aluminum nitride, mullite or a cordierite-type glass-ceramic. The crossover is a thick film dielectric composed of a glassceramic having a primary crystal phase of willemite and a secondary phase of cordierite.
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 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 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.