Vegetable seed oil insulating fluid
CA 2204273 C · Owner: Sundin, David W · Inventors: Sundin, David W
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A unique, fire resistant, environmentally safe insulating oil comprised of selected vegetable oils fortified with additives, to improve stability and low temperature viscosity characteristics. The electrical equipment comprises an oil-sealed tank the, insulating oil filling the tank, and electrical components such as a transformer, switch, or fuse immersed in the described oil. Also contemplated is a solid-liquid insulation system comprising porous insulating materials saturated with vegetable seed oil.
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 May 1, 1997 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2019.
- 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.