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. 19, 2004
Filed:
Dec. 17, 2001
Applicant:
Inventor:
Ho Fan Jang, Vancouver, CA;
Assignee:
Pulp and Paper Research Institute of Canada, Pointe Claire, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J 3/30 ;
U.S. Cl.
CPC ...
G01J 3/30 ;
Abstract
The invention relates to a fluorescence microscopy technique for measuring physical and chemical properties of individual fiber-like particles. Fluorescence intensity per unit length is shown to be proportional to the fiber coarseness. In addition, other fiber properties such as fiber length, width and wall thickness can be obtained from fluorescence images, and lignin content from fluorescence spectra. The present invention will provide a process for determining the uniformity of pulp samples in terms of the physical and chemical properties of the individual fiber-like particles, particularly wood pulp fibers.