Liquid purification or separation – Filter – Material
Reexamination Certificate
2004-10-21
2010-06-29
Fortuna, Ana M (Department: 1723)
Liquid purification or separation
Filter
Material
C210S490000, C210S500380, C210S500420, C210S500360, C428S315700
Reexamination Certificate
active
07743929
ABSTRACT:
The present invention provides for a method of producing an integral multilayered porous membrane by simultaneously co-casting a plurality of polymer solutions onto a support to form a multilayered liquid sheet and immersing the sheet into a liquid coagulation bath to effect phase separation and form a porous membrane. The support can be a temporary support or form an integrated support for the membrane. The plurality of layers may be of the same polymer or different, same concentration or viscosity or different and may be subjected to the same processing conditions or different ones to form unique structures.
REFERENCES:
patent: 2806256 (1957-09-01), Smith-Johannsen
patent: 3347391 (1967-10-01), Steensen
patent: 3876738 (1975-04-01), Marinaccio et al.
patent: 3948823 (1976-04-01), Lee et al.
patent: 4203847 (1980-05-01), Grandine
patent: 4203848 (1980-05-01), Grandine
patent: 4247498 (1981-01-01), Castro
patent: 4261834 (1981-04-01), deWinter
patent: 4340479 (1982-07-01), Pall
patent: 4340480 (1982-07-01), Pall et al.
patent: 4489671 (1984-12-01), Choinski
patent: 4629563 (1986-12-01), Wrasidlo
patent: 4666607 (1987-05-01), Josefiak et al.
patent: 4707265 (1987-11-01), Barnes et al.
patent: 4770777 (1988-09-01), Steadly et al.
patent: 4774039 (1988-09-01), Wrasidlo
patent: 4873037 (1989-10-01), Chau et al.
patent: 4882223 (1989-11-01), Aptel et al.
patent: 4933081 (1990-06-01), Sasaki et al.
patent: 4983288 (1991-01-01), Karbachsch et al.
patent: 5013339 (1991-05-01), Mahoney et al.
patent: 5228994 (1993-07-01), Tkacik et al.
patent: 5240615 (1993-08-01), Fishman
patent: 5256357 (1993-10-01), Hayward
patent: 5273657 (1993-12-01), Nakashima et al.
patent: 5433859 (1995-07-01), Degen
patent: 5444097 (1995-08-01), Tkacik
patent: 5462867 (1995-10-01), Azad et al.
patent: 5489406 (1996-02-01), Beck et al.
patent: 5500167 (1996-03-01), Degen
patent: 5514461 (1996-05-01), Meguro et al.
patent: 5550167 (1996-08-01), DesMarais
patent: 5562983 (1996-10-01), Kono et al.
patent: 5620790 (1997-04-01), Holzki et al.
patent: 5626805 (1997-05-01), Meguro et al.
patent: 5736051 (1998-04-01), Degen et al.
patent: 5741549 (1998-04-01), Maier et al.
patent: 5811196 (1998-09-01), Hachisuka et al.
patent: 5834107 (1998-11-01), Wang et al.
patent: 5846422 (1998-12-01), Ditter
patent: 5869174 (1999-02-01), Wang
patent: 5886059 (1999-03-01), Wang
patent: 5906742 (1999-05-01), Wang et al.
patent: 5958989 (1999-09-01), Wang et al.
patent: 5962075 (1999-10-01), Sartor et al.
patent: 5979670 (1999-11-01), Ditter et al.
patent: 6045899 (2000-04-01), Wang et al.
patent: 6056529 (2000-05-01), Meyering et al.
patent: 6090441 (2000-07-01), Vining et al.
patent: 6110369 (2000-08-01), Ditter et al.
patent: 6146747 (2000-11-01), Wang et al.
patent: 6264044 (2001-07-01), Meyering et al.
patent: 6277281 (2001-08-01), Ditter et al.
patent: 6440306 (2002-08-01), Ditter et al.
patent: 6464084 (2002-10-01), Pulck
patent: 6497752 (2002-12-01), Kessler et al.
patent: 6513666 (2003-02-01), Meyering et al.
patent: 6536605 (2003-03-01), Rice et al.
patent: 6565782 (2003-05-01), Wang et al.
patent: 6706184 (2004-03-01), Sale et al.
patent: 6736912 (2004-05-01), Fields et al.
patent: 6736971 (2004-05-01), Sale et al.
patent: 6939468 (2005-09-01), Wang et al.
patent: 6994811 (2006-02-01), Kools
patent: 7201860 (2007-04-01), Wechs
patent: 2002/0113006 (2002-08-01), Sale et al.
patent: 2002/0127387 (2002-09-01), Sale et al.
patent: 2003/0035943 (2003-02-01), Jones et al.
patent: 2003/0209485 (2003-11-01), Kools
patent: 2003/0217965 (2003-11-01), Kools
patent: 2004/0084364 (2004-05-01), Kools
patent: 2004/0124135 (2004-07-01), Sale et al.
patent: 2005/0040100 (2005-02-01), Kools
patent: 2006/0180543 (2006-08-01), Kools
patent: 2006/0180544 (2006-08-01), Kools
patent: 0 572 329 (1993-05-01), None
patent: 0 578 210 (1994-01-01), None
patent: 0764461 (2002-08-01), None
patent: 56-91815 (1981-07-01), None
patent: 60-76323 (1985-04-01), None
patent: 60-132605 (1985-07-01), None
patent: 62-11617 (1994-08-01), None
patent: 09-24260 (1997-01-01), None
patent: 09024260 (1997-01-01), None
patent: 09-254294 (1997-09-01), None
patent: WO 93/22034 (1993-11-01), None
patent: WO 94/09880 (1994-05-01), None
patent: WO 98/30379 (1998-07-01), None
patent: 99/47335 (1999-09-01), None
patent: 00/43113 (2000-07-01), None
patent: 01/89672 (2001-11-01), None
patent: WO 01/89673 (2001-11-01), None
patent: WO 2005/014151 (2005-02-01), None
Brock, “Membrane Filtration: A User's Guide and Reference Manual,” Chapter 3, pp. 29-35 (1983).
Kools, “Membrane Formation by Phase Inversion in Multicomponent Polymer Systems, Mechanisms and Morphologies,” Thesis, pp. 1-191, Feb. 27, 1998.
Taylor et al., “Visualization and Flow Simulation of a Two-Layer Slot Coater,”Chemical Engineering Science54:909-918 (1999).
Cohen, “Two-Layer Slot Coating: Flow Visualization and Modelling,” Thesis, University of Minnesota, Dec. 1993.
Taylor, “Two-Layer Slot Coating: Study of Die Geometry and Interfacial Region,” Thesis, McMaster University, Jul. 1997.
Groöbe et al., “Multilayer Membranes I. A New Type of Asymmetric Synthetic Membranes,”Synthetic Polymeric Membranes. Ed. B. Sedlacek, J. Kahovec, Walter Gruyter & Co., Berlin, (1987).
Gröbe et al., “Ein neues Prinzip für die Herstellung von asymmetrischen Polymermembranen,”Acta Polymerica30:62-63 (1979).
Hiatt et al., “Microporous Membranes Via Upper Critical Temperature Phase Separation,”Materials Science of Synthetic Membranes, ed., D.R. Lloyd, American Chemical Society, Washington, D.C., pp. 229-244 (1985).
Schenkel, “Plastics Extrusion Technology and Theory,” Iliffe Books Ltd., London, published by American Elsevier Publishing Company Inc., New York, pp. 336-337 (1967).
Weigel et al., “Bicomponent membranes. IV. Influence of Membrane Formation Principles on the Structure of the Active Layer of Membranes,”Acta Polymerica42:366-371 (1991).
Weigel et al., “Bikomponentenmembranen II. Herstellung von Bikomponentenmembranen unter Einsatz einer Bikomponentenbreitschlitzdüse,”Acta Polymerica40:734-740 (1989).
Weigel et al., “Bikomponentenmembranen III. Diffusion und Strukturbildung bei der Koagulation von Polymerlösungen unetr Einsatz einer Bikomponentenbreitschlitzdüse,”Acta Polymerica41:124-131 (1990).
Fortuna Ana M
Millipore Corporation
Nixon & Peabody LLP
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