Lu T Zhang

US Patent:

7208126, Apr 24, 2007

Filed:

Mar 19, 2004

Appl. No.:

10/804277

Inventors:

Charles David Musick - Waverly TN, US
Lu Zhang - Newark DE, US

Assignee:

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

International Classification:

C01G 1/00
C01G 23/00

US Classification:

423 69, 423 84, 423610, 423611, 423612, 423613, 977773, 977775, 977777, 977811

Abstract:

Titanium dioxide nanopowder is produced by a process, comprising:.

US Patent:

7217407, May 15, 2007

Filed:

Sep 3, 2004

Appl. No.:

10/933557

Inventors:

Lu Zhang - Newark DE, US

Assignee:

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

International Classification:

C01B 13/20
C01B 13/22
C01G 23/00

US Classification:

423610, 423611, 423612, 423613, 423DIG 10, 204164, 977773, 977775, 977777, 977811

Abstract:

The present invention is a method of increasing particle surface area and decreasing the concentration of over-sized particles in a process for making metal oxide particles, particularly nanoparticle TiO, in an inlet-fed, plug flow, plasma reactor by vapor phase reaction of titanium tetrachloride and oxygen in the presence of a source of hydrogen to form titanium dioxide particles.

US Patent:

7771666, Aug 10, 2010

Filed:

Dec 16, 2003

Appl. No.:

10/537042

Inventors:

Stephan Claude De La Veaux - Wilmington DE, US
Lu Zhang - Newark DE, US

Assignee:

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

International Classification:

B01J 12/00
C09C 1/00
C01G 23/047

US Classification:

422129, 422150, 422151, 422158, 423612

Abstract:

The present invention provides a method and apparatus for the controlled synthesis of nanoparticles using a high temperature process. The reactor chamber includes a high temperature gas heated by means such as a plasma torch, and a reaction chamber. The homogenizer includes a region between the reactant inlets and the plasma (the spacer zone) to ensure that feeds from the reactant inlets are downstream of the recirculation zone induced by the high temperature gas. It also includes a region downstream of the reactant inlets that provides a nearly I dimensional (varying only in the axial direction) flow and concentration profile in the reaction zone to produce nanoparticles with narrow size distribution.

US Patent:

8139668, Mar 20, 2012

Filed:

Jul 15, 2009

Appl. No.:

12/503465

Inventors:

Philip V. Orlik - Cambridge MA, US
Lu Zhang - Newark DE, US
Raymond Yim - Cambridge MA, US
Jinyun Zhang - Cambridge MA, US

Assignee:

Mitsubishi Electric Research Laboratories, Inc. - Cambridge MA

International Classification:

H04L 5/12
H04B 7/02
H03C 7/02

US Classification:

375265, 375267, 455101

Abstract:

A transmitter encodes an input bitstream using space-time trellis coding (STTC). The encoder includes a serial to parallel convertor to produce a first and second output bitstreams. First and second three bit shift registers are connected to produce first and second output bitstreams. A multiplier applies a code generating weight to each bit of the shift registers to encode the bitstreams. A first switch is connected between a last bit of the first shift register and a first bit of the second shift register. A second switch is connected between the second output and the first bit of the second shift register. The first set of encoded bit streams and the second set of encoded bitstreams are combined and mapped to a frequency domain.

US Patent:

8520791, Aug 27, 2013

Filed:

Jul 15, 2009

Appl. No.:

12/503507

Inventors:

Philip V. Orlik - Cambridge MA, US
Lu Zhang - Newark DE, US
Raymond Yim - Cambridge MA, US
Jinyun Zhang - Cambridge MA, US

Assignee:

Mitsubishi Electric Research Laboratories, Inc. - Cambridge MA

International Classification:

H04L 7/00
H04L 12/28
G06F 12/00

US Classification:

375356, 370258, 711220

Abstract:

An encoder in a transmitter uses space-time trellis coding. An input bitstream is multiplexed to produce in parallel a set of output bitstreams. A multiplier applies a code generating weight to each output bitstream, which are combined, mapped and transmitted by a single antenna.

US Patent:

20050119398, Jun 2, 2005

Filed:

Sep 3, 2004

Appl. No.:

10/933792

Inventors:

Lu Zhang - Newark DE, US

International Classification:

B01J023/00
C01B013/14
C01C001/00
C01D001/02
C01B013/00
C01G057/00
C01G023/047
C08K003/22

US Classification:

524497000, 423610000, 502350000, 423592100, 423593100, 106436000, 106437000, 051309000

Abstract:

A process for minimizing and even eliminating over-sized particles in a vapor phase synthesis of metal oxide-containing particles comprising reacting oxygen with one of more vapor streams comprising a titanium halide, a silicon halide and a compound selected from the group consisting of phosphorous, germanium, boron, tin, niobium, chromium, silver, gold, palladium aluminum, and mixtures thereof in a plug flow, plasma reactor.

US Patent:

20060142419, Jun 29, 2006

Filed:

Oct 14, 2005

Appl. No.:

11/251259

Inventors:

Jingjing Xu - Wilmington DE, US
Charles Molnar - Wilmington DE, US
Shekhar Subramoney - Hockessin DE, US
Michael Crawford - Glen Mills PA, US
John Gergely - Avondale PA, US
Lu Zhang - Midlothian VA, US
Edwin Marston - Wilmington DE, US

International Classification:

C09D 11/00
C09D 5/00

US Classification:

523161000, 977900000

Abstract:

The present invention is a dispersion composition comprising (1) a curable mixture of monomers, oligomers, or a combination thereof; and (2) superparamagnetic particles dispersed in the mixture of part (1) and a method for preparing such superparamagnetic particles. The composition of the present invention can be useful as a tool for detecting and/or deterring theft, counterfeiting, or the like in commercial transactions.

US Patent:

20070085053, Apr 19, 2007

Filed:

Oct 14, 2005

Appl. No.:

11/250336

Inventors:

John Gergely - Avondale PA, US
Edwin Marston - Wilmington DE, US
Shekhar Subramoney - Hockessin DE, US
Lu Zhang - Midlothian VA, US

International Classification:

C01G 49/08

US Classification:

252062560, 977900000

Abstract:

A process for preparing superparamagnetic transition metal nanoparticles by introducing into a gas stream a hydrocarbon and a transition metal carboxyl wherein the transition metal carbonyl is introduced downstream from the hydrocarbon; wherein at the point of introduction of the hydrocarbon the gas stream is in the form of a plasma, and wherein at the point of introduction of the transition metal carbonyl the gas stream is at a temperature of at least 1000 C.; followed by quenching to form carbon-coated transition metal nanoparticles; and wherein the gas stream consists essentially of at least one inert gas and hydrogen.