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:
Dec. 13, 2011
Filed:
Nov. 04, 2004
Applicant:
Richard James Pearce, Swampscott, MA (US);
Inventor:
Richard James Pearce, Swampscott, MA (US);
Assignee:
Millipore Corporation, Billerica, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 61/18 (2006.01); B01D 61/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is an ultrafiltration (UF) membrane having a nominal molecular weight cut off (NMWCO) of from about 0.5 KD to about 10 KD wherein the membrane surfaces have a charge that is either positive or negative. The present invention is also a method of using the charged UF membrane to purify and concentrate synthetic biological molecules by using the charged surface either to repel the synthetic biomolecules retaining them in the retentate or to attract the synthetic biomolecules preferentially for filtration through the membrane.