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:
Oct. 26, 1993
Filed:
Jun. 20, 1991
Applicant:
Inventors:
Viet Ngo, Minneapolis, MN (US);
Gary L D'Heilly, Savage, MN (US);
Assignee:
The Lemna Corporation, Mendota Heights, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210151 ; 210170 ; 2102421 ; 405 52 ;
Abstract
A sewage treatment pond has an inlet for introduction of sewage into the pond and an outlet for removal of sewage from the pond. A first baffle extends from the surface of the pond to the bottom of the pond and between the inlet and the outlet. The first baffle has an opening located a first distance from the surface of the pond so that sewage can pass through the opening. A second baffle is located between the inlet and the outlet. The second baffle extends from the surface of the pond to the bottom of the pond. The second baffle has an opening located a second distance from the surface of the pond.