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:
Apr. 28, 2026
Filed:
Nov. 29, 2021
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Marko Kolari, Espoo, FI;
Juhana Ahola, Espoo, FI;
Assignee:
KEMIRA OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 21/36 (2006.01); D21C 9/00 (2006.01); D21H 11/14 (2006.01); D21H 17/65 (2006.01);
U.S. Cl.
CPC ...
D21H 21/36 (2013.01); D21C 9/004 (2013.01); D21H 11/14 (2013.01); D21H 17/65 (2013.01);
Abstract
The invention relates to a method for reducing bacterial endospores in an aqueous fibre suspension comprising recycled cellulosic fibres, wherein the fibre suspension has an original endospore amount, preferably of ≥10 000 CFU/ml. The method comprises adjusting the pH of the fibre suspension to a pH value of ≤6.5, adjusting the oxidation-reduction potential (ORP) of the fibre suspension to an ORP value of ≥200 mV with a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent to the fibre suspension for reducing the bacterial endospores to an endospore amount of ≤1000 CFU/ml.