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:
Aug. 11, 1998
Filed:
Feb. 20, 1996
Applicant:
Inventor:
Toru Murakami, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 6448 ; 118402 ;
Abstract
An apparatus for determining the amount of any chemical substance exhibiting a surface activity. A monomolecule film including a surface active substance exhibiting a surface activity is formed on a surface of a surface active substance solution in which the surface active substance is dissolved. Subsequently, a surface pressure of the monomolecule film is measured in order to find a concentration of the surface active substance where a content of the surface active substance is defined by the concentration of the surface active substance and the amount of the solution.