Water-tree stable electrical insulating polymeric compositions
CA 1290933 C · Owner: Cloetens, Rudolphe C. · Inventors: Cloetens, Rudolphe C.; Umpleby, Jeffrey D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition suitable for use as electrical insulation comprises a polymeric component and a water tree retardant additive which is (A) an organo orthoborate or partial ester of boric acid having the general formula B(OR)(OR1)(OR2) in which R is an alkyl aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbons and R1 and R2 are individually hydrogen or an alkyl aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms or (B) an organo orthoborate or partial ester of boric acid with a polyhydric hydrocarbyl alcohol.
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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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.