Stephen Dr Li

US Patent:

48520837, Jul 25, 1989

Filed:

Jun 22, 1987

Appl. No.:

7/065231

Inventors:

Jeffrey A. Niehaus - Dallas TX
Robert G. Fleck - Dallas TX
Stephen Li - Garland TX
Bob D. Strong - Garland TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04M 318

US Classification:

370 58

Abstract:

A digital crossbar switch for switching data from an input/output data bus to an internal data bus and to the same or another input/output data bus which includes a plurality of multiplexer logic units, an m-bit internal data bus coupled to each of said multiplexer logic units where m is an integer, and a plurality of n-bit input/output data buses one connected to each of the multiplexer logic units were n is an integer. The switch further includes an m/n to 1 multiplexer, where m/n is an integer, in each multiplexer logic unit. The m/n to 1 multiplexer has an input control to the internal data bus and an output coupled to a corresponding one of the input/output data buses and is operative in response to a configuration control signal to switch a selected n-bits of data from the internal data bus to the corresponding input/output data bus. A memory storage for storing configuration control signals is coupled to the m/n to 1 multiplexer.

US Patent:

45390843, Sep 3, 1985

Filed:

Mar 10, 1983

Appl. No.:

6/473963

Inventors:

Thomas C. Bissot - Newark DE
Stephen Li - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C25B 134
C25B 1302
C25B 1308

US Classification:

204 98

Abstract:

An unreinforced ion exchange membrane which comprises fluorinated polymer which has carboxylic functional groups, which has a hydrogen bubble release layer on the cathode-facing side thereof, and which has channels open to the outer surface of the anode-facing side thereof, is described. Precursor membrane, which may contain partially embedded sacrificial members, and from which the unreinforced ion exchange membrane is made, is also described. The unreinforced ion exchange membrane can be used to separate the compartments of a chloralkali cell, and such a cell operates at low voltage, high current efficiency, and low power consumption.

US Patent:

51896656, Feb 23, 1993

Filed:

Mar 10, 1992

Appl. No.:

7/850020

Inventors:

Jeff A. Niehaus - Dallas TX
Stephen Li - Garland TX
Frank Laczko - Plano TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04Q 1104
H04L 1240

US Classification:

3704581

Abstract:

A digital crossbar switch designed to facilitate easy and flexible interconnection of up to 8 data ports. The device includes 8 bidirectional ports, each 8 bit wide. Interconnection of the ports is controlled by 32 stored control memory locations associated with each port. The controlling memory locations can be changed dynamically without interfering with data flow. Additional program flexibility can be achieved by providing each port with a 16 word first-in first-out data buffer. The capability to bit reverse the data on any of the ports is also provided to simplify the interconnection of busses from different architectures. The device is fully expandable to wider busses, has extensive test capability and a master reset is provided for system initialization.

US Patent:

45526311, Nov 12, 1985

Filed:

Mar 10, 1983

Appl. No.:

6/473962

Inventors:

Thomas C. Bissot - Newark DE
Stephen Li - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C25B 146
C25B 1302
C25B 1308

US Classification:

204 98

Abstract:

A reinforced ion exchange membrane which comprises fluorinated polymer which has carboxylic functional groups, which has a hydrogen bubble release layer on the cathode-facing side thereof, and which has channels open to the outer surface of the anode-facing side thereof, is described. Precursor membrane, which may contain partially embedded sacrificial members, and from which the reinforced ion exchange membrane is made, is also described. The reinforced ion exchange membrane can be used to separate the compartments of a chloralkali cell, and such a cell operates at low voltage, high current efficiency, and low power consumption.

US Patent:

44365993, Mar 13, 1984

Filed:

Apr 13, 1983

Appl. No.:

6/484557

Inventors:

Thomas C. Bissot - Newark DE
Stephen Li - Wilmington DE

Assignee:

E. I. DuPont DeNemours & Company - Wilmington DE

International Classification:

C25B 134
C25B 1104

US Classification:

204 98

Abstract:

The invention provides an improved process for making an iron-activated cathode for a chloralkali cell, and an improved method for lowering the operating voltage of a chloralkali electrolysis cell, which comprises adding to the cathode compartment of the cell a solution of a water-soluble or caustic-soluble ferrite and passing an electric current through the cell. By virtue of the invention, the hydrogen overvoltage in the cell is lowered, and considerable operating improvement thereby attained.

US Patent:

57213348, Feb 24, 1998

Filed:

Feb 16, 1996

Appl. No.:

8/602878

Inventors:

Albert H. Burstein - Longboat Key FL
Stephen Li - Lawrenceville NJ

Assignee:

NewYork Society for the Ruptured and Crippled Maintaining the Hospital
for Special Surgery - New York NY

International Classification:

C08F11002

US Classification:

526352

Abstract:

Shaped articles made from molded ultra high molecular weight polyethylene (UHMWPE) with an average molecular weight of between about 1 million and about 10 million and exhibiting a low modulus of elasticity throughout the shaped article or in selected regions of the shaped article are disclosed. These articles are produced by filling a mold with powdered UHMWPE, covering the mold with a piston, raising the temperature of the mold and its contents to between about 140. degree. and about 225. degree. C. while simultaneously applying a pressure of between about 2. 5 and about 15 MPa to the mold and its contents, maintaining the pressure and temperature for between about 5 and about 25 minutes, with the time selected dependent upon the thickness of the molded part, then dropping the temperature of the molded part, either completely or in part at a rate between about 4. degree. and about 175. degree. C. /minute either while maintaining the mold at the molding pressure, at pressure less than the molding pressure or under no external applied pressure.

US Patent:

50379283, Aug 6, 1991

Filed:

Mar 23, 1990

Appl. No.:

7/500053

Inventors:

Stephen Li - Wilmington DE
Edward G. Howard - Hockessin DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B29C 4312
C08F11002
A61F 232

US Classification:

526352

Abstract:

A process for preparing an ultrahigh molecular weight linear polyethylene (UHMWLPE) exhibiting a combination of properties including a creep resistance of less than 1% demonstrated under exposure to a temperature of 23. degree. C. (+ or -1. degree. C. ) and a relative humidity of 50 (+ or -2% for 24 hours under a compression of 1000 psi) without sacrificing excellent tensile and flexural properties. The invention includes the use of an inert gas and a prescribed pattern of heating and cooling including a further heat and cooling treatment to create the superior properties of the UHMWLPE. Also included is the product of the process invention.