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. 28, 1977
Filed:
Nov. 24, 1975
Hans Walter Kiefer, Nussdorf, DT;
Lothar Herbert Riethmuller, Uhldingen-Muhlhofen, DT;
Ernst Gunther Spreitzhofer, Nussdorf, DT;
The Perkin-Elmer Corporation, Norwalk, CT;
Abstract
The photoelectric detector output in the spectrophotometer is amplified with separate stages of fixed and variable gain to derive background absorption compensation when the intensity of the continuous spectrum emitting radiation source therein varies from optimum levels. Where a reference output of the photoelectric detector is desirable for the background absorption compensation, a dark interval of the photoelectric detector and an output channel are provided for each gain stage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile