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:
Mar. 16, 1993
Filed:
Jul. 10, 1989
James J Foster, Clifton Forge, VA (US);
Westvaco Corporation, New York, NY (US);
Abstract
Instruments for determining the degree of delignification corresponding to a sample of kraft or soda process digested wood pulp are calibrated with a predetermined quantity of refined lignin. For convenient use and application, a standardized solution comprising such refined lignin and an organic solvent such as ethylene glycol may be prepared for distribution to use points. Such standardized refined lignin, whether tested as a powdered solid or as a standardized solution yields a consistent 'K' Number, 'Permanganate' Number, 'Kappa' Number or 'Klason' Number value from standardized titration test procedures.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile