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. 23, 1993
Filed:
Feb. 27, 1992
Applicant:
Inventors:
Robert L Wetegrove, Winfield, IL (US);
Rodney H Banks, Naperville, IL (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356382 ; 356244 ; 356434 ; 356440 ; 250341 ; 250576 ;
Abstract
Method and apparatus for monitoring film formers in an opaque process stream by immersing a segment of a transparent eccentrically mounted rotatable disc in the fluid stream, allowing time to accumulate film formers, then rotating the disc to expose the previously immersed section to optical monitoring by which a sample transmittance may be compared to a reference transmittance; the disc may have a segment presenting a hydrophilic surface and another segment presenting a hydrophobic surface so that different kinds of film formers may be monitored.