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:
Dec. 30, 1986
Filed:
Jan. 25, 1984
Applicant:
Inventors:
Johannes H Beurskens, Weert, NL;
Christiaan Prozee, Weert, NL;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01K / ; H01J / ;
U.S. Cl.
CPC ...
313112 ; 313116 ; 313113 ; 313635 ;
Abstract
The lamp envelope of the electric lamp is coated at the inner surface with an electrostatically applied light-scattering pigmented powder layer. The powder layer comprises at least a cadmium-containing pigment and further a cadmium-free pigment for example in approximately equal part by weight. Although cadmium-free pigments alone cannot give lamps the desired color properties, it has been found that they are capable of replacing cadmium-containing pigments in the powder layer up to a high percentage by weight.