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. 17, 1981
Filed:
Jan. 31, 1980
Applicant:
Inventors:
Gerald E Wardell, Killaloe, IE;
Vincent J McBrierty, Sutton, IE;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
324307 ; 324308 ;
Abstract
An NMR test method is provided for determining the homogeneity of dispersion of a filler substance such as carbon black in an elastomer composition such as a rubber, either on an arbitrary scale or by reference to a standard dispersion of optimum homogeneity which is given the value 1.0 on a linear scale. The method involves measuring the intensity of the short component and the total intensity of the proton free induction decay, of a sample of the dispersion deriving the ratio P.sub.t of said intensities, and optionally deriving a second similar ratio P.sub.s from the standard dispersion to permit a value P.sub.t /P.sub.s on said linear scale to be derived.