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:
Aug. 10, 2010
Filed:
Feb. 21, 2006
Ventzislav H. Kirov, Lake Bluff, IL (US);
Anil Sethy, Glenview, IL (US);
Bryan L. Sorensen, Gages Lake, IL (US);
Ventzislav H. Kirov, Lake Bluff, IL (US);
Anil Sethy, Glenview, IL (US);
Bryan L. Sorensen, Gages Lake, IL (US);
Packaging Corporation of America, Mundelein, IL (US);
Abstract
A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.