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. 22, 2018
Filed:
Dec. 17, 2014
Ecolab Usa Inc., St. Paul, MN (US);
Wen Bai, Shanghai, CN;
Jian Xu, Shanghai, CN;
Jia Wu, Shanghai, CN;
Zhi Chen, Shanghai, CN;
Jian Kun Shen, Shanghai, CN;
Raymond D. Miller, Jr., Carol Stream, IL (US);
Jane B. Wong Shing, Aurora, IL (US);
Ecolab USA Inc., St. Paul, MN (US);
Abstract
The present invention relates to colloidal silicas having a low S-value and a high solids content, the preparation thereof, and the use thereof in the production of paper. When used in the production of paper, the colloidal silicas of the invention exhibit good retention and drainage performance so that they can be used in lower amounts compared to conventional colloidal silicas. The present invention also relates to an apparatus and a method for producing such activated colloidal silicas.