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:
Mar. 18, 1997
Filed:
Mar. 09, 1995
Applicant:
Inventors:
Tsuyoshi Inoue, Kanagawa, JP;
Keiichi Nakamachi, Saitama, JP;
Takeshi Nakamura, Kanagawa, JP;
Kenji Okada, Tokyo, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436180 ; 73 37 ; 7329 / ; 7386424 ; 422 72 ; 422100 ; 436 45 ; 436 50 ; 436 54 ;
Abstract
A tube is inserted into a first liquid layer, and an air bubble is generated at a tip opening of the tube. The tube is then moved toward a second liquid layer while retaining the air bubble, and a change in the internal pressure of the tube caused by the air bubble reaching the boundary between the first and second liquid layers is detected. After the tip opening of the tube is raised to the top surface of the first liquid layer, the first liquid is sucked up by the tube while the tube is moved to the position where the pressure change was detected.