Benjamin P Chu

US Patent:

6339121, Jan 15, 2002

Filed:

Mar 14, 2000

Appl. No.:

09/525709

Inventors:

Miriam Rafailovich - Plainview NY
Jonathan Sokolov - Plainview NY
Shaoming Zhu - Stony Brook NY
Benjamin Chu - Setauket NY

Assignee:

The Research Foundation at State University of New York - Stony Brook NY

International Classification:

C08K 334

US Classification:

524445

Abstract:

The present invention is polymer blend, which includes at least two immiscible polymers, and a compatibilizer used to produce a substantially homogeneous blend. The compatibilizer is a functionalized nanocomposite which prevents segregation of the polymer components in the polymer blend. The nanocomposites are formed by combining an organoclay and an intercalation agent. The intercalation agent is a reaction product of a polyamine functionalized with an alkyl halide in a polar solvent. The compatibilized blends are used in thin films, which are especially useful in microlithographic applications and as lubricants in low tolerance magnetic disks.

US Patent:

6569932, May 27, 2003

Filed:

Jul 6, 2001

Appl. No.:

09/900408

Inventors:

Benjamin S. Hsiao - Setauket NY 11733
Benjamin Chu - Setauket NY 11733
Xuan Fu - Centereach NY 11720
Rusty L. Blanski - Lancaster CA 93536
Shawn H. Phillips - Lancaster CA 93536

International Classification:

C08K 554

US Classification:

524269, 524442, 524585, 524586

Abstract:

Compositions include blends of ethylene-based polymers and polyhedral oligomeric silsesquioxanes (POSS) or polyhedral oligomeric silicates (POS), having hydrocarbon substitution and processes for producing such compositions.

US Patent:

6685956, Feb 3, 2004

Filed:

May 16, 2001

Appl. No.:

09/859007

Inventors:

Benjamin Chu - Setauket NY
Benjamin S. Hsiao - Setauket NY
Dufei Fang - Painted Post NY
Collin Brathwaite - Setauket NY

Assignee:

The Research Foundation at State University of New York - Stony Brook NY

International Classification:

A61F 202

US Classification:

424423, 424424, 424425, 424426

Abstract:

Biodegradable and/or bioabsorable fibrous articles and methods for using the articles in medical applications are disclosed. The biodegradable and/or bioabsorable fibrous articles, which are formed by elctrospinning fibers of biodegradable and/or bioabsorbable fiberizable material, comprise a composite (or asymmetric composite) of different biodegradable and/or bioabsorbable fibers. Articles having specific medical uses include an adhesion-reducing barrier and a controlled delivery system. The methods include methods for reducing surgical adhesions, controlled delivery of a medicinal agent and providing controlled tissue healing.

US Patent:

6689374, Feb 10, 2004

Filed:

Feb 27, 2003

Appl. No.:

10/375329

Inventors:

Benjamin Chu - Setauket NY
Benjamin S. Hsiao - Setauket NY
Dufei Fang - Painted Post NY
Collin Brathwaite - Setauket NY

Assignee:

The Research Foundation of State University of New York - Stony Brook NY

International Classification:

A61F 202

US Classification:

424423, 424424, 424425, 424426

Abstract:

Biodegradable and/or bioabsorable fibrous articles and methods for using the articles in medical applications are disclosed. The biodegradable and/or bioabsorable fibrous articles, which are formed by elctrospinning fibers of biodegradable and/or bioabsorbable fiberizable material, comprise a composite (or asymmetric composite) of different biodegradable and/or bioabsorbable fibers. Articles having specific medical uses include an adhesion-reducing barrier and a controlled delivery system. The methods include methods for reducing surgical adhesions, controlled delivery of a medicinal agent and providing controlled tissue healing.

US Patent:

6713011, Mar 30, 2004

Filed:

May 16, 2001

Appl. No.:

09/859004

Inventors:

Benjamin Chu - Setauket NY
Benjamin S. Hsiao - Setauket NY
Dufei Fang - Painted Post NY

Assignee:

The Research Foundation at State University of New York - Stony Brook NY

International Classification:

D01D 500

US Classification:

264465, 2641761, 425135, 425145, 425166, 4251748 E, 425224, 425464

Abstract:

An apparatus and method for electrospinning polymer fibers and membranes. The method includes electrospinning a polymer fiber from a conducting fluid in the presence of a first electric field established between a conducting fluid introduction device and a ground source and modifying the first electric field with a second electric field to form a jet stream of the conducting fluid. The method also includes electrically controlling the flow characteristics of the jet stream, forming a plurality of electrospinning jet streams and independently controlling the flow characteristics of at least one of the jet streams. The apparatus for electrospinning includes a conducting fluid introduction device containing a plurality of electrospinning spinnerets, a ground member positioned adjacent to the spinnerets, a support member disposed between the spinnerets and the ground member and movable to receive fibers formed from the conducting fluid, and a component for controlling the flow characteristics of conducting fluid from at least one spinneret independently from another spinneret.

US Patent:

6770698, Aug 3, 2004

Filed:

Jun 5, 2000

Appl. No.:

09/586628

Inventors:

Benjamin Chu - Setauket NY
Liguo Song - Port Jefferson NY
Dufei Fang - Painted Post NY
Dehai Liang - Stony Brook NY
Tianbo Liu - Stony Brook NY

Assignee:

The Research Foundation at State University of New York - Stony Brook NY

International Classification:

C08L 5100

US Classification:

524458, 524500, 524501, 525903

Abstract:

The present invention is a polymer solution for the efficient separation of charged macromolecules by electrophoresis that includes a plurality of polymers. These polymers are entangled to form an interpenetrating network with greater entanglement times than corresponding homopolymers of the same length. These polymers are different and do not phase separate when dissolved in solution. Preferred polymers are PAM and PVP or PDAM and PVP. The polymer solutions of the present invention provide at least a 500-base read length in one run for a single-stranded DNA separation.

US Patent:

6790455, Sep 14, 2004

Filed:

Sep 14, 2001

Appl. No.:

09/953114

Inventors:

Benjamin Chu - Setauket NY
Benjamin S. Hsiao - Setauket NY
Michael Hadjiargyrou - Coram NY
Dufei Fang - Painted Post NY
Xinhua Zong - Centereach NY
Kwangsok Kim - Setauket NY

Assignee:

The Research Foundation at State University of New York - Stony Brook NY

International Classification:

A61F 200

US Classification:

424423, 424 937, 435180, 435182, 435395

Abstract:

Cell storage and delivery systems and methods for storing and delivering viable cells to a mammal are disclosed. The cell storage and delivery systems include a biodegradable and/or bioabsorbable fibrous matrix physically associated with viable cells to contain and release the cells at a controlled rate. The biodegradable and/or bioabsorbable matrix can be formed by electrospinning fibers of biodegradable and/or bioabsorbable fiberizable material. The methods include methods for storing viable cells and for delivering viable cells to a mammal using the cell storage and delivery system.

US Patent:

7037978, May 2, 2006

Filed:

Sep 25, 2003

Appl. No.:

10/671335

Inventors:

Benjamin Chu - Setauket NY, US
Liguo Song - Williamsville NY, US
Dufei Fang - Painted Post NY, US
Dehai Liang - Stony Brook NY, US
Tianbo Liu - Coram NY, US
Yanmei Wang - Hefei, CN
Qicong Ying - East Setauket NY, US

Assignee:

The Research Foundation of SUNY at Stony Brook - Stony Brook NY

International Classification:

C08L 9/02
C08L 33/20

US Classification:

525218, 525230, 525234, 5253294, 524458

Abstract:

The invention relates to a quasi-interpenetrating network of polymer chains, the chains comprising linear polyacrylamide (LPA) chains in the form of a main frame having a weight average molecular weight of approximately 0. 05 million to approximately 25 million g/mole, and a radius of gyration of approximately 10 nm to 350 nm; and polydimethylacrylamide (PDMA) chains prepared by polymerizing PDMA in the presence of the LPA main frame, wherein the LPA and PDMA chains are entangled within one another and interpenetrate one another, and wherein the quasi-interpenetrating network has substantially no chemical cross-linking.