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:
Oct. 31, 1989
Filed:
Sep. 24, 1987
Applicant:
Inventors:
Hans Rau, Aachen, DE;
Petrus F De Jongh, Veldhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912159 ; 219 / ; 219 / ; 21912147 ; 427 12 ; 427 34 ; 118623 ;
Abstract
In the internal coating of a tube of an electrically insulating material by a second electrically insulating material by reactive deposition of the second electrically insulating material from a gas mixture which is passed through the tube, the desposition is activated by a plasma which is produced by microwaves and is reciprocated in the tube. A method with low energy consumption and a device of a simple construction are made possible in that the plasma is excited by TE 011 resonance in a cylindrical resonator.