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:
Jan. 13, 1998
Filed:
Jan. 06, 1994
Applicant:
Inventors:
E Craig Jowett, Rockwood, Ontario, CA;
Michaye L McMaster, Waterloo, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210150 ; 210170 ; 210218 ; 210262 ; 210617 ;
Abstract
The treatment system is for use with septic tank effluent. Water is passed over polyurethane foam blocks, arranged in a heap so that air can circulate freely around the blocks. The size of the foam cells is small enough that water soaks into the blocks and is retained therein. The foam is soft and easily deformed. At the points of block-to-block engagement, the blocks deflect and conform to each other, giving rise to a large contact area through which water can pass between blocks.