Composition containing benzyltoluenes and benzylxylenes, its application as dielectrics
CA 2083752 C · Owner: Elf Atochem S.A. · Inventors: Berger, Noelle; Jay, Pierre; Commandeur, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a composition characterized by the fact that it includes a benzyltoluene oligomer with formula (A1): with n1 and n2=0, 1 or 2 knowing that n1+n2 is less than or equal to 3 and at least one benzyltoluene oligomer with the formula (A2): with q1 and q2=0, 1 or 2 knowing that qn1+q2 is less than or equal to 3. This composition can define a dielectric fluid with improved breakdown voltage. The invention also concerns the use of the said composition as a dielectric fluid.
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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
- Filed November 25, 1992 and granted June 9, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2014.
- 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.