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:
Sep. 22, 2026
Filed:
Dec. 07, 2022
Aikawa Fiber Technologies Inc., Sherbrooke, CA;
Daniel Paterson, Sherbrooke, CA;
Jens O. Heymer, Montreal, CA;
Ronald J. Defoe, Becket, MA (US);
Robert William Gooding, Montreal, CA;
AIKAWA FIBER TECHNOLOGIES INC., Sherbrooke, CA;
Abstract
Disclosed is a refiner filling piece for a refiner having a rotor that rotates about an axis of rotation and cooperates with a stator to mechanically treat a pulp containing cellulosic fibers. The refiner filling piece is mountable to the rotor or the stator. The refiner filling piece comprises a base and a plurality of spaced-apart refiner bars, each refiner bar having a leading surface and a trailing surface. At least one of the refiner bars has a leading surface coated with a first coating and a trailing surface coating with a second coating. The first and second coatings have different chemical compositions and/or different physical properties. Alternatively, the first and second coatings may be applied to distinct portions of the same surface.