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. 05, 2005
Filed:
Sep. 04, 2002
Applicants:
Yih-fang Chen, Lisle, IL (US);
Robert C. Lam, Rochester, MI (US);
Feng Dong, Rochester, MI (US);
Bulent Chavdar, Rochester Hills, WI (US);
Inventors:
Yih-Fang Chen, Lisle, IL (US);
Robert C. Lam, Rochester, MI (US);
Feng Dong, Rochester, MI (US);
Bulent Chavdar, Rochester Hills, WI (US);
Assignee:
BorgWarner Inc., Auburn Hills, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B005/16 ; B32B003/26 ;
U.S. Cl.
CPC ...
Abstract
A friction material has a first layer of a base material and a second layer of at least one type of friction modifying particle having substantially symmetrical geometric shapes on a top surface of the base material. The second layer has an average thickness of about 30 to about 200 microns and the surface area coverage of about 80 to about 100% such that the top layer has a fluid permeability lower than the first layer.