The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1987
Filed:
Jul. 13, 1984
Applicant:
Inventor:
Alain Anton, Chaponnay, FR;
Assignee:
Alsthom-Atlantique, S.A., Paris Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ; H01B / ; H01B / ; H01B / ;
U.S. Cl.
CPC ...
428251 ; 156 53 ; 156 55 ; 1741 / ; 1741 / ; 1741 / ; 1741 / ; 427386 ; 4273898 ; 4274073 ; 428285 ; 428324 ; 4284228 ; 525528 ; 528 52 ; 528 73 ;
Abstract
Process for insulating by impregnation an electric winding with isocyanurate and oxazolidone cycles resins, in which one wraps around the conductors a glass cloth and porous mica paper tape loaded with a quaternary ammonium salt catalyzing the condensation of the isocyanate and epoxy compounds into isocyanurate and oxazolidone cycles, one impregnates the tape with a varnish containing an isocyanate compound and a liquid epoxy resin, then one subjects the impregnated tape to a varnish polymerization thermal treatment. One uses as a quaternary ammonium salt a benzyl-trialkylammonium halide with an alkyl chain containing at the most 3 carbon atoms.