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:
Feb. 27, 1990
Filed:
Mar. 29, 1988
Applicant:
Inventors:
Johannes J Ponjee, Eindhoven, NL;
Rudolf P Tijburg, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 49 ; 357 52 ;
Abstract
The invention relates to a semiconductor laser device having a coating on surfaces of a semiconductor body intended for emanation of a laser beam. For protection of these surfaces against attack during operation of the laser this coating comprises a layer of a compound having at least one alkyl group.