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:
Mar. 01, 2005
Filed:
Nov. 15, 2002
Michael D. Morris, Nashua, NH (US);
Joanne Liu, Lowell, MA (US);
Steven E. Brown, Tyngsboro, MA (US);
Michael D. Morris, Nashua, NH (US);
Joanne Liu, Lowell, MA (US);
Steven E. Brown, Tyngsboro, MA (US);
Cabot Corporation, Boston, MA (US);
Abstract
The invention provides an aqueous dispersion comprising fumed silica particles, colloidal silica particles, and water. The fumed silica particles have a BET surface area of about 70 to about 140 m/g, and the colloidal silica particles have a BET surface area of about 110 to about 150 m/g. Also, the total amount of silica in the dispersion is about 35% to about 60% by weight, and the fumed silica particles comprise about 25% to about 80% by weight of the total amount of silica in the dispersion. The invention also provides a coating composition and a recording medium incorporating the inventive dispersion.