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:
Sep. 04, 2007
Filed:
Apr. 23, 2004
Gary L. Gibson, Midland, MI (US);
Keith Hayes, Bay City, MI (US);
Meng H. Heng, Belmont, CA (US);
Csilla Kollar, Midland, MI (US);
Thomas H. Lane, Midland, MI (US);
Anthony Revis, Freeland, MI (US);
Landon M. Steele, Redwood City, CA (US);
Gary L. Gibson, Midland, MI (US);
Keith Hayes, Bay City, MI (US);
Meng H. Heng, Belmont, CA (US);
Csilla Kollar, Midland, MI (US);
Thomas H. Lane, Midland, MI (US);
Anthony Revis, Freeland, MI (US);
Landon M. Steele, Redwood City, CA (US);
Dow Corning Corporation, Midland, MI (US);
Genencor International, Inc., Palo Alto, CA (US);
Abstract
The present invention provides methods for separating one or more components of interest from a sample containing particulates and soluble materials. The method comprises the steps of: (a) filtering a sample through silica filter media whose surface silanol groups have reacted with one or more silanes, and (b) simultaneously capturing particulates and binding a soluble component to the silica filter media. The bound soluble component of interest is subsequently eluted from the silica filter media. In one embodiment of the invention, unwanted soluble materials are captured by the treated silica filter media and desired component of interest is recovered from the flow-through. In another embodiment of the invention, different components of interest are recovered from both the eluate and the flow-through. Preferred treated silica filter media are silane-treated rice hull ash or diatomaceous earth with functional quaternary ammonium group or functional sulphonate group. Particulates suitable for the present invention, for example, are microorganisms.