ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,796, issued on Oct. 28, was assigned to KEMIRA OYJ (Helsinki).
"Pulp quality monitoring" was invented by Marjatta Piironen (Helsinki), Iiris Joensuu (Helsinki) and Lari Vahasalo (Helsinki).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for monitoring hydrophobic particles contained in a pulp suspension, includes obtaining a sample from a pulp suspension or a filtrate of the pulp suspension. A fluorescent dye is added to the sample to stain particles in the sample. The sample is fractionated to obtain at least a first fraction and a second fraction, wherein the second fraction is a fiber fraction. The method includes for the obtained fraction...