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:
Oct. 04, 2005
Filed:
Dec. 07, 2001
Applicants:
Jeffrey Arthur Odell, Bristol, GB;
Stephen Paul Carrington, Bristol, GB;
Inventors:
Jeffrey Arthur Odell, Bristol, GB;
Stephen Paul Carrington, Bristol, GB;
Assignee:
University of Bristol, , GB;
Primary Examiner:
Int. Cl.
CPC ...
G01N011/10 ;
U.S. Cl.
CPC ...
Abstract
A method for determination of the extensional rheological properties of a liquid comprises application to a sample of liquid in a closed system of a pulsed oscillatory alternating flow in a geometry creating an extension flow surrounding a stagnation point and measuring the pressure drop in the liquid across the stagnation point. The alternating displacement may be applied from the ends of each limb in a given direction simultaneously, thereby providing symmetrical flow. The method may be carried out on very small sample volumes of dilute polymer solutions.