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:
Apr. 10, 2001
Filed:
Nov. 29, 1999
Yvonick Chevallier, Fontaines-Saint-Martin, FR;
Evelyne Prat, Pantin, FR;
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Abstract
A mechanically strong, vulcanized elastomeric matrix having an effective amount of a reinforcing filler material homogeneously dispersed and distributed therethrough, the reinforcing filler material comprising finely divided precipitated silica particulates and the precipitated silica particulates deriving from a powder having a CTAB specific surface ranging from 100 to 140 m,/g, a median diameter &phgr;,, after ultrasonic disintegration, less than 2.8 &mgr;m, exhibiting an ultrasonic disintegration factor F,greater than 3 ml, having a BET specific surface ranging from 100 to 200 m,/g, having a mean particle size greater than 15 &mgr;m, a packing density in the tamped state of at least 0.17, and a DOP oil uptake ranging from 150 to 400 ml/100 g.