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:
Jan. 13, 2009
Filed:
Dec. 05, 2006
Anthony J. Martino, West Chester, PA (US);
Ken Stephen Schermacher, Chadds Ford, PA (US);
Anthony J. Martino, West Chester, PA (US);
Ken Stephen Schermacher, Chadds Ford, PA (US);
E.I Du Pont De Nemours & Company, Wilmington, DE (US);
Abstract
A method for measuring a color property of a pressurized flowing liquid is characterized by contacting the liquid under test against a transparent partition spaced a predetermined distance from a transparent window. The partition has an index of refraction and a thickness dimension that is less than that of the window. At least some of the radiation reflected from the liquid undergoes total internal reflection within the partition while, simultaneously, evanescent coupling of that reflected radiation into the material of the window is prevented. Evanescent coupling into the material of the window is prevented by: i) disposing a medium having an index of refraction less than that of the partition between the window and the partition, and ii) maintaining the spacing between the window and the partition to a distance not less than three (3) times the wavelength of the interrogating radiation.