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:
Feb. 10, 2026
Filed:
Apr. 27, 2022
Applicant:
Hitachi High-tech Corporation, Tokyo, JP;
Inventors:
Assignee:
HITACHI HIGH-TECH CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L 27/00 (2006.01); G01N 30/32 (2006.01); G01N 30/86 (2006.01);
U.S. Cl.
CPC ...
G01N 30/8665 (2013.01); G01N 30/32 (2013.01);
Abstract
A liquid chromatography analyzer acquires a first output value P1 of a pressure sensor measured by opening a flow passage to the atmosphere or by installing, in a column installation portion, a first column that is not filled with a filler, acquires a second output value P2 of the pressure sensor measured by installing a second column having a known pressure resistance Ps in the column installation portion, and updates a gain of the pressure sensor by using the first output value P1 and the second output value P2. Thus, inspection and adjustment of the pressure sensor can be easily performed without adding a complicated mechanism.