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:
May. 15, 2001
Filed:
Feb. 28, 1992
Applicant:
Inventor:
Ted Yuan Tsai, Harriman, NY (US);
Assignee:
International Paper Company, Purchase, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/147 ; D21C 9/153 ;
U.S. Cl.
CPC ...
D21C 9/147 ; D21C 9/153 ;
Abstract
In the post-digestion treatment of kraft cellulosic pulp, the improvement comprising subjecting the pulp to a two-phase process in which the two-phases are substantially identical and each phase includes contacting the pulp first with an ozone/oxygen mixture at a temperature below about 60° C. and thereafter with oxygen with the pulp at a temperature above about 65° C.
Tsai, Ted. (2001). Two phase ozone and oxygen pulp treatment (U.S. Patent No. 6231718). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6231718
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile