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:
May. 08, 1979
Filed:
Nov. 11, 1977
Applicant:
Inventors:
Eli A Kallet, New York, NY (US);
Samuel Cravitt, Hartsdale, NY (US);
Assignee:
Farrand Optical Co., Inc., Valhalla, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; G01J / ;
U.S. Cl.
CPC ...
356318 ; 2504 / ; 356324 ; 356246 ;
Abstract
A dual beam differential spectrophotometer using a rotating chopper wheel having reflective transparent, and opaque sectors transmits light alternately through standard and sample material cells for comparison. Diffuse reflectors insertable in the material cells permit the apparatus to be used either as a differential spectrofluorometer or as a differential absorption meter.