Anthony E Allegrezza

US Patent:

58854568, Mar 23, 1999

Filed:

Aug 9, 1996

Appl. No.:

8/689549

Inventors:

John Charkoudian - Carlisle MA
Anthony E. Allegrezza - Milford MA

Assignee:

Millipore Corporation - Bedford MA

International Classification:

B01D 2900

US Classification:

21050041

Abstract:

A porous membrane, such as a microporous or ultrafiltration membrane, is formed from a solution of a polysulfone and a free radical polymerizable monomer exposed to ultraviolet light to form a blend of the polysulfone and copolymers of polysulfone activation products and polymerized monomer having polymer segments covalently bonded to each other. The solution is separated into two phases including a porous solid phase comprising the membrane.

US Patent:

50966375, Mar 17, 1992

Filed:

Dec 5, 1990

Appl. No.:

7/623856

Inventors:

Anthony J. DiLeo - Westford MA
Anthony E. Allegrezza - Milford MA
Edmund T. Burke - Winchester MA

Assignee:

Millipore Corporation - Bedford MA

International Classification:

B01D 6114
B01D 6700

US Classification:

264 451

Abstract:

A composite membrane and process utilizing the membrane which is capable of selectively removing particles such as viral particles from a solution such as a protein solution is provided. The membrane comprises a porous membrane substrate, a surface skin having ultrafiltration separation properties and an intermediate porous zone between the substrate and the skin which intermediate zone has an average pore size smaller than that of the substrate. The intermediate zone is free of voids which break the skin and which directly fluid communicate with the substrate. The composite is capable of a log reduction value of at least 3 (99. 9% removal) of particles selectively from solution.

US Patent:

50792725, Jan 7, 1992

Filed:

Nov 30, 1989

Appl. No.:

7/444086

Inventors:

Anthony E. Allegrezza - Milford MA
Ellen C. Bellantoni - Framingham MA

Assignee:

Millipore Corporation - Bedford MA

International Classification:

C08L 3308
C08L 3310
C08J 928

US Classification:

521134

Abstract:

A porous membrane is formed from an interpenetrating polymer network of a hydrophobic polymer and a polymerized and crosslinked hydrophilic monomeric composition. A solution of the polymer and monomeric composition is cast, exposed to ultraviolet radiation, coagulated and dried. The resulting dried membrane is annealed in order to render its surface hydrophilic.

US Patent:

48245682, Apr 25, 1989

Filed:

May 16, 1986

Appl. No.:

6/864074

Inventors:

Anthony E. Allegrezza - Milford MA
Edmund T. Burke - Winchester MA

Assignee:

Millipore Corporation - Bedford MA

International Classification:

B01D 1300

US Classification:

210490

Abstract:

Composite ultrafiltration membranes are disclosed which are produced by forming an ultrafiltration membrane structure on a preformed microporous membrane.

US Patent:

50172921, May 21, 1991

Filed:

May 10, 1990

Appl. No.:

7/521784

Inventors:

Anthony J. DiLeo - Westford MA
Anthony E. Allegrezza - Milford MA
Edmund T. Burke - Winchester MA

Assignee:

Millipore Corporation - Bedford MA

International Classification:

B01D 1614

US Classification:

210645

Abstract:

A composite membrane and process utilizing the membrane which is capable of selectively removing particles such as viral particles from a solution such as a protein solution is provided. The membrane comprises a porous membrane substrate, a surface skin having ultrafiltration separation properties and an intermediate porous zone between the substrate and the skin which intermediate zone has an average pore size smaller than that of the substrate. The intermediate zone is free of voids which break the skin and which directly fluid communicate with the substrate. The composite is capable of a log reduction value of at least 3 (99. 9% removal) of particles selectively from solution.

US Patent:

51587211, Oct 27, 1992

Filed:

Sep 6, 1991

Appl. No.:

7/755968

Inventors:

Anthony E. Allegrezza - Milford MA
Ellen C. Bellantoni - Framingham MA

Assignee:

Millipore Corporation - Bedford MA

International Classification:

B29C 3508
C08J 328
B01D 3914

US Classification:

264 22

Abstract:

A porous membrane is formed from an interpenetrating polymer network of a hydrophobic polymer and a polymerized and crosslinked hydrophilic monomeric composition. A solution of the polymer and monomeric composition is cast, exposed to ultraviolet radiation, coagulated and dried. The resulting dried membrane is annealed in order to render its surface hydrophilic.