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. 05, 1983
Filed:
Oct. 19, 1981
Applicant:
Inventor:
Rollin G Brown, Chesterfield, MO (US);
Assignee:
Edison International, Inc., Rolling Meadows, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; H01K / ;
U.S. Cl.
CPC ...
427106 ; 106 74 ; 106 84 ; 427165 ; 427169 ;
Abstract
The invention relates to a composition for an opaque coating for minimizing the light output from selected areas of an incandescent lamp, particularly a halogen lamp. It has been discovered that a paste comprising a mixture of sodium silicate and manganese dioxide, when thinned with water to a desired consistency, then applied to the external surface of a halogen lamp bulb and properly dried, forms a tightly adhering, opaque coating of dark gray color which resists flaking and blistering at operational temperatures of the halogen lamp.