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:
May. 10, 2005
Filed:
Jan. 28, 2002
Jiang Ji, Andover, MA (US);
Candeloro Dicecca, Somerville, MA (US);
Edward M. Schulz, Acton, MA (US);
Mahesh Mehta, Needham, MA (US);
David Stead, Lowell, MA (US);
David Mckinley, Melrose, MA (US);
David H Koch, New York, NY (US);
Jiang Ji, Andover, MA (US);
Candeloro DiCecca, Somerville, MA (US);
Edward M. Schulz, Acton, MA (US);
Mahesh Mehta, Needham, MA (US);
David Stead, Lowell, MA (US);
David McKinley, Melrose, MA (US);
David H Koch, New York, NY (US);
Koch Membrane Systems, Wilmington, MA (US);
Abstract
A hollow fiber microfiltration (MF) membrane is provided. The casting solution used to make this membrane includes a fiber-forming polymer having a degree of polymerization greater than about 1000, a water-soluble polymer, an anhydride with about 2 to 12 carbon atoms, and a solvent. The membrane is formed by mixing and heating these components to form a viscous dope and then extruding the dope through an annular orifice to form a hollow fiber MF membrane. The hollow fiber membrane is then fed through a coagulation bath and two leaching baths. The membrane is especially useful for filtering liquids, such as wine and juice, so as to remove bacteria, gel, and solid particles from the liquids.