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:
Feb. 15, 2005
Filed:
Feb. 27, 2001
Applicants:
Paulus Johannes Kunkeler, Weert, NL;
Willem Hendrik Dokter, Almere, NL;
Inventors:
Paulus Johannes Kunkeler, Weert, NL;
Willem Hendrik Dokter, Almere, NL;
Assignee:
Grace GmbH & Co. KG., Worms, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B005/16 ;
U.S. Cl.
CPC ...
Abstract
The invention pertains to an amorphous silica particle comprising 0.1 to 10ppm boron atoms, and optionally 0.05 to 15 wt. % aluminum atoms wherein the boron and aluminum atoms are covalently bonded to the oxygen atoms of the silica network. The amorphous silica particles are used as a reinforcing filler for rubber articles, particularly for tires, more particularly for tire treads.