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:
Nov. 28, 2006
Filed:
Dec. 14, 2001
Jonathan F. Hester, Hudson, WI (US);
Brian E. Spiewak, Inver Grove Heights, MN (US);
David R. Holm, Hudson, WI (US);
Jerald W. Hall, Jr., Maplewood, MN (US);
Seth M. Kirk, Minneapolis, MN (US);
Moses M. David, Woodbury, MN (US);
Brinda B. Lakshmi, Woodbury, MN (US);
Jonathan F. Hester, Hudson, WI (US);
Brian E. Spiewak, Inver Grove Heights, MN (US);
David R. Holm, Hudson, WI (US);
Jerald W. Hall, Jr., Maplewood, MN (US);
Seth M. Kirk, Minneapolis, MN (US);
Moses M. David, Woodbury, MN (US);
Brinda B. Lakshmi, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Described is an apparatus for the removal of organic substances and/or nitrogen sources from an aqueous medium by exposing the aqueous medium to the action of microorganisms supported on a gas permeable, water impermeable layer, or on and/or in a three dimensional microbial support layer, that is proximate a gas delivery layer through which gas, preferably, oxygen-containing gas, is supplied to the gas permeable layer such that it diffuses through the gas permeable layer and is supplied to the microorganisms.