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:
Jan. 10, 1984
Filed:
Jun. 22, 1981
Applicant:
Inventor:
Enid K Sichel, Lincoln, MA (US);
Assignee:
GTE Laboratories Incorporated, Waltham, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313112 ;
Abstract
Selective optical absorption filters which transmit infrared light and absorb or partially reflect visible light comprise thin films of partially pyrolyzed polymeric aromatic pyromellitimides. The filters are characterized by a metallic luster and maximum light transmittance above about 2 .mu.m wavelength. A lamp is disclosed having a reflective filter disposed behind the filament to reflect visible light forward through the front portion of the lamp while transmitting infrared light rearward through the back portion of the lamp.