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:
Jun. 26, 1990
Filed:
Jan. 26, 1989
Applicant:
Inventor:
Jurgen Witt, Hainburg, DE;
Assignee:
W. C. Heraeus GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21M / ;
U.S. Cl.
CPC ...
362255 ; 362293 ; 362294 ; 362804 ;
Abstract
A lighting system, including a light source having a light bulb and a reflector, has an interference filter applied to a portion of the outer surface of the light bulb. The interference filter has a high transparency for visible light and a high reflectivity for infrared radiation. The area of the light bulb that is permeable to infrared radiation is adjacent to an area of the reflector which is made to be infrared-radiation transmitting.