Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ
Reexamination Certificate
2006-07-04
2006-07-04
Fortuna, Ana M. (Department: 1723)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
C210S500230, C210S500410, C210S500420, C264S177100, C264S177140, C264S17800F
Reexamination Certificate
active
07070721
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.
REFERENCES:
patent: 1421341 (1922-06-01), Zsigmondy
patent: 4399035 (1983-08-01), Nohmi et al.
patent: 4481260 (1984-11-01), Nohmi
patent: 4612119 (1986-09-01), Eguchi
patent: 4690766 (1987-09-01), Linder et al.
patent: 4822223 (1989-04-01), Williams
patent: 5039421 (1991-08-01), Linder et al.
patent: 5151227 (1992-09-01), Nguyen et al.
patent: 5340480 (1994-08-01), Kawata et al.
patent: 5401410 (1995-03-01), Bell et al.
patent: 5443727 (1995-08-01), Gagnon
patent: 5462867 (1995-10-01), Azad et al.
patent: 5762798 (1998-06-01), Wenthold et al.
patent: 5833896 (1998-11-01), Jacobs et al.
patent: 5871680 (1999-02-01), Macheras et al.
patent: 5906742 (1999-05-01), Wang et al.
patent: 5979670 (1999-11-01), Ditter et al.
patent: 6110369 (2000-08-01), Ditter et al.
patent: 6165363 (2000-12-01), Oishi et al.
patent: 6218441 (2001-04-01), Meluch et al.
patent: 6432309 (2002-08-01), Fuke et al.
patent: 6596167 (2003-07-01), Ji et al.
patent: 6755900 (2004-06-01), Koros et al.
patent: 6884350 (2005-04-01), Muller
patent: 6890435 (2005-05-01), Ji et al.
DiCecca Candeloro
Ji Jiang
Koch David H.
McKinley David
Mehta Mahesh
Fortuna Ana M.
Koch Membrane Systems
Stinson Morrison & Hecker LLP
LandOfFree
Method of making and using a hollow fiber microfiltration... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making and using a hollow fiber microfiltration..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making and using a hollow fiber microfiltration... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3578267