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:
Jun. 07, 1988
Filed:
Feb. 26, 1987
Applicant:
Inventors:
Gilbert W Burnett, Rockwall, TX (US);
Paul D Jackson, Rockwall, TX (US);
Assignee:
Air Purification Products, International, Royse City, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55316 ; 55387 ; 55481 ; 55467 ; 55486 ; 55410 ; 55512 ; 55509 ; 55DI / ;
Abstract
A filtering unit (10) has four filter holders (20) arranged in a rectangle around a blower (36). Each filter holder holds up to two filter elements (11). The blower draws air through the filter elements (11) and outputs filtered air through a vent (40). Refillable filter frames (16) are provided to allow the user to change the filter material (18). In one embodiment, glass chips are used as the filter material (18).