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. 25, 2003
Filed:
May. 17, 2001
Applicant:
Inventors:
John H. Beard, Kearney, NE (US);
Allan Roush, Thorntown, IN (US);
Assignee:
Baldwin Filters, Inc., Kearney, NE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 2/700 ; B01D 3/500 ; F01M 1/00 ; C10M / ;
U.S. Cl.
CPC ...
B01D 2/700 ; B01D 3/500 ; F01M 1/00 ; C10M / ;
Abstract
The present invention provides a filter apparatus for use in removing impurities and acids contained in a fluid that includes a particulate filter and an acid-neutralizing filter. The particulate filter and the acid-neutralizing filter may be positioned within separate housings or they may be positioned within a common housing. The acid-neutralizing filter contains an acid-neutralizing compound such as crushed limestone, calcium carbonate or magnesium carbonate.