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:
Aug. 02, 1977
Filed:
Jun. 16, 1975
Applicant:
Inventor:
Robert Jerome Tucker, Hackettstown, NJ (US);
Assignee:
American Cyanamid Company, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
252300 ;
Abstract
Optical filters comprised of a plastic film having incorporated therein a mixture of dyes including defined amounts of a copper phthalocyanine sulfonamide compound and a vanadyl phthalocyanine sulfonamide compound are substantially opaque to visible light but permit a high transmission of radiation in the near infrared region.