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:
Aug. 03, 1993
Filed:
Aug. 09, 1991
Applicant:
Inventors:
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 402 ; 264 401 ; 264235 ; 264346 ;
Abstract
Process for the production of an electrical insulant (5) placed in an intense electrical field, particularly between two electrodes (1, 2) of an electron tube. The insulant (5) is a crystalline material, whose free surfaces (7) in vacuo (6) have been treated so as to reduce or eliminate crystallization defects. The treatment is checked by measurements of a particular optical or mechanical property of the free surfaces. The breakdown voltage can be multiplied by three or four compared with conventional insulants and can approach the breakdown voltage of the vacuum.