Voltage non-linear resistor and method of producing the same
CA 2050097 C · Owner: Imai, Osamu · Inventors: Imai, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An excellent voltage non-linear resistor having a superior voltage-current characteristic property a good switching current impulse withstanding capability, a good lightning current impulse withstanding capability, a large discharge voltage V0.1mA of 230-330 V/mm, a small deterioration rate of the discharge voltage V0.1mA after applying a lightning current impulse, a prolonged electric life under electrical stress, and a splendid discharge voltage at large current area is provided which contains zinc oxide as a main component, and subsidiary components of 1 0.5-1.2 mole% of bismuth oxide calculated as Bi2O3 2 0.3-1.5 mole% of cobalt oxide calculated as CO2O3 3 0.2-0.8 mole% of manganese …
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 28, 1991 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 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.