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. 24, 2004
Filed:
Aug. 20, 2002
Edward C. Homonoff, Brooklyn, CT (US);
John A. Davis, Camden, NY (US);
Stephen D. Copperwheat, Rome, NY (US);
Richard W. Mayo, Central Square, NY (US);
Franklin D. Cean, Adams, NY (US);
Other;
Abstract
A transmission fluid filter material and transmission filter produced therefrom comprising a gradient density composite felt which exhibits high particle removal efficiency at 40 micron diameter particle size and larger with exceptionally high dirt holding capacity and no significant increase in clean pressure drop. The upstream portion of the composite felt contains fine fibers that selectively remove first the fine particles while the downstream portion acts to sieve coarse particles and build a porous filter cake, thereby extending the useful life of the filter.