Electrical insulating oil composition
CA 1339625 C · Owner: Dohi, Hideyuki · Inventors: Kawakami, Shigenobu; Endo, Keiji; Dohi, Hideyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrical insulating oil composition which comprises 45% by weight or more of at least 2 members selected from the group consisting of (a) m-ethylbiphenyl (b) p-ethylbiphenyl, (c) o-benzyltoluene (d) m-benzyltoluene, (e) p-benzyltoluene and (f) 1,1-diphenylethane; and the, remainder of non-condensed bicyclic aromatic hydrocarbons having not more than 17 carbon atoms besides the above 6 components; and is characterized in that when the temperature, of the composition is -40°C (I) the total quantity of solid, phase obtained by calculating according to the following solid-liquid equilibrium equation is 45% by weight or less relative to the total quantity of the composition and (II), in the …
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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
- Granted January 20, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 2015.
- 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
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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.