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. 29, 1991
Filed:
Apr. 24, 1989
Sharon B Rutfield, No. Chelmsford, MA (US);
Steven C Schlitt, Merrimack, MA (US);
GTE Products Corporation, Danvers, MA (US);
Abstract
A fluorescent lamp designed to emit light in the red region of the visible spectrum suitable for reprographic applications. The lamp includes a colored envelope (e.g., amber) which is capable of attenuating light below about 500 nanometers. A layer containing a single narrow-band phosphor having a peak emission in the wavelength region of from about 590 to 660 nanometers is disposed on the inner surface of the envelope. The phosphor layer may consist of a mixture the narrow-band phosphor and a predetermined amount of alumina. Preferably, the alumina by weight is within the range of from about 55 percent to about 95 percent by weight of the phosphor.