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:
Nov. 02, 1982
Filed:
Mar. 04, 1980
Applicant:
Inventors:
Arnold Schwartz, Bridgeport, CT (US);
Edward B Delany, Ridgefield, CT (US);
Assignee:
The Perkin-Elmer Corp., Norwalk, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
364497 ; 73 231 ; 364571 ;
Abstract
In a solvent gradient liquid chromatography system, base line shift is compensated by operating the system in a calibrate cycle with a desired solvent gradient program while subtracting and recording in digital form correction factors sufficient to maintain a flat base line at timed intervals during the program, and then successively recalling said digital correction factors at corresponding time intervals during a run cycle with a test sample and converting the correction factors to analog form and subtracting the converted correction factors from the system output signal for base line correction.