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:
Oct. 19, 1999
Filed:
Jul. 07, 1997
Applicant:
Inventors:
John R McLauglin, Media, PA (US);
Paul G Linsen, West Chester, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621816 ; 162175 ; 1621646 ; 1621817 ; 1621682 ;
Abstract
A microparticle composition for paper making includes finely divided particles of a water insoluble solid such as zeolite A, and having an anionic charge of at least 20 millivolts, and preferably from about 40 to 60 millivolts, and a particle size of less than about 0.1 microns. The microparticle composition also includes water and a dispersion agent, and is prepared by milling in an agitated media mill until the desired particle size is achieved.