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. 10, 1976
Filed:
Apr. 20, 1972
Applicant:
Inventors:
Loren John Van der Werf, Elkhart, IN (US);
Myron Colman Rapkin, Elkhart, IN (US);
Assignee:
Miles Laboratories, Inc., Elkhart, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
2323 / ; 2325 / ; 252408 ;
Abstract
A method for determining the freeze point of an antifreeze-containing solution which includes simply dipping into the solution to be tested a bibulous material incorporated with a pH indicator and a buffer for maintaining the pH of the absorbed solution near or within the color change range of the indicator and comparing any apparent color change developed thereon to a color chart correlated to indicate various colors corresponding to various freeze points of antifreeze-containing solutions.