Feng Chen

US Patent:

6451123, Sep 17, 2002

Filed:

Jan 11, 2000

Appl. No.:

09/481732

Inventors:

Michael Saska - Baton Rouge LA
Feng Chen - Baton Rouge LA

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

B01D 1508

US Classification:

127 462, 127 463

Abstract:

Improved separations of xylose, mannose, galactose, arabinose, glucose, xylitol, arabitol; sorbitol, galactitol, or mannitol (and other monosaccharides and sugar alcohols) from other sugars and sugar alcohols may be achieved by chromatography over hydroxyl-form anion exchange surfaces prepared from anion exchange resins at relatively low hydroxyl concentrations. When a strong base anion exchange resin, such as a chloride-form strong base anion exchange resin, is conditioned with a low concentration of hydroxyl (for example, an NaOH solution with a concentration between 0. 1 and 1000 mM, most preferably between 1 and 10 mM), the conditioned resin separates a number of sugars and sugar alcohols from one another, while still allowing ready desorption from the resin.

US Patent:

6650624, Nov 18, 2003

Filed:

May 19, 2000

Appl. No.:

09/574558

Inventors:

Thomas J. Quigley - Lawrenceville GA
Jonathan S. Min - Buena Park CA
Lisa V. Denney - Suwanee GA
Henry Samueli - Corona Del Mar CA
Sean F. Nazareth - Anaheim Hills CA
Feng Chen - Irvine CA
Fang Lu - Irvine CA
Christopher R. Jones - Newport Beach CA

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 1228

US Classification:

370252, 375222

Abstract:

A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems located different distances from the headend. The power transmission level, slot timing, and equalization of the cable modems are set by a ranging process. Data is transmitted by the modems in fragmented form. Various measures are taken to make transmission from the cable modems robust. The upstream data transmission is controlled to permit multiple access from the cable modems.

US Patent:

6763032, Jul 13, 2004

Filed:

Feb 10, 2000

Appl. No.:

09/501892

Inventors:

Theodore F. Rabenko - Duluth GA
James C. H. Thi - Irvine CA
Thomas J. Quigley - Lawrenceville GA
Lisa V. Denney - Suwanee GA
Jonathan S. Min - Buena Park CA
Christopher R. Jones - Newport Beach CA
Henry Samueli - San Juan Capistrano CA
Fang Lu - Irvine CA
Feng Chen - Irvine CA
Sean F. Nazareth - Anaheim Hills CA

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 7212

US Classification:

370442, 370488

Abstract:

A method for communicating information is disclosed wherein a time slot is allocated in a time division multiple access system for a transmission from a subscriber to a headend. Synchronization of a clock of the subscriber with respect to a clock of the headend is enhanced using a message transmitted from the headend to the subscriber which is indicative of an error in a subscriber transmission time with respect to the time slot. A feedback loop process is used to determine at least one of fractional symbol timing correction and carrier phase correction of a transmission from the subscriber to the headend. Filter coefficients are generated at the headend from a ranging signal transmitted from the subscriber to the headend and transmitting the filter coefficients from the headend to the subscriber, the filter coefficients being used by the subscriber to compensate for noise in a transmission from the subscriber to the headend.

US Patent:

6890960, May 10, 2005

Filed:

Oct 18, 2000

Appl. No.:

09/856760

Inventors:

Gregg Henderson - Saint Gabriel LA, US
Roger A. Laine - Baton Rouge LA, US
Donald O. Heumann - Metairie LA, US
Feng Chen - Baton Rouge LA, US
Betty C. R. Zhu - Baton Rouge LA, US

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

A01N035/00
A01N031/00

US Classification:

514691, 514729

Abstract:

Extracts of vetiver oil were found to significantly repel termites. In one extract, nootkatone was isolated and found to be a significant repellent and toxicant of termites. Nootkatone significantly decreased food consumption, decreased tunneling behavior, and increased mortality in termites. Nootkatone is an effective repellent and toxicant of termites either by itself or as an addition to other materials or substrates, including mulches made from vetiver grass roots or other wood products. Nootkatone can also be used to protect construction wood from attack by Formosan subterranean termites. Nootkatone as a repellent is non-toxic to humans and other mammals and is environmentally safe. In addition, α-cedrene was found to be a weak termite repellent; and both zizanol and bicyclovetivenol were found to be repellents and toxicants of termites.

US Patent:

6906108, Jun 14, 2005

Filed:

Aug 17, 2001

Appl. No.:

09/932555

Inventors:

Gregg Henderson - Saint Gabriel LA, US
Donald O. Heumann - Metairie LA, US
Roger A. Laine - Baton Rouge LA, US
Lara Maistrello - Baton Rouge LA, US
Betty C. R. Zhu - Baton Rouge LA, US
Feng Chen - Baton Rouge LA, US

Assignee:

Board of Supervisors of Louisiana State University and Agricultural and Mechanical College - Baton Rouge LA

International Classification:

A61K031/12
A61K031/045
A61K031/015
A01N027/00

US Classification:

514691, 514729, 514766

Abstract:

Extracts of vetiver oil were found to be significant repellents and toxicants of ants, ticks, and cockroaches. Nootkatone was shown to significantly decrease ant invasion and increase mortality in fire ants. Nootkatone is an effective repellent and toxicant of ants either by itself or as an addition to other substrates, including mulches made from vetiver grass roots, diatomaceous earth, alumina, silica, clays; building materials made from either aluminum or wood; and other suitable solid substances. Nootkatone was also a repellent and toxicant to ticks; and a repellent to cockroaches. Nootkatone is non-toxic to humans and other mammals and is environmentally safe. In addition, it is believed that other extracts of vetiver oil, specifically α-cedrene, zizanol and bicyclovetivenol, will be effective against ants, ticks, and cockroaches.

US Patent:

6961314, Nov 1, 2005

Filed:

Aug 25, 2000

Appl. No.:

09/648895

Inventors:

Thomas J. Quigley - Lawrenceville GA, US
Jonathan S. Min - Buena Park CA, US
Lisa V. Denney - Suwanee GA, US
Henry Samueli - Corona Del Mar CA, US
Sean F. Nazareth - Anaheim Hills CA, US
Feng Chen - Irvine CA, US
Fang Lu - Irvine CA, US
Christopher R. Jones - Newport Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L012/28

US Classification:

370252, 370352, 375222

Abstract:

A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems located different distances from the headend. The power transmission level, slot timing, and equalization of the cable modems are set by a ranging process. Data is transmitted by the modems in fragmented form. Various measures are taken to make transmission from the cable modems robust. The upstream data transmission is controlled to permit multiple access from the cable modems.

US Patent:

6965616, Nov 15, 2005

Filed:

Oct 6, 2000

Appl. No.:

09/684712

Inventors:

Thomas J. Quigley - Lawrenceville GA, US
Jonathan S. Min - Buena Park CA, US
Lisa V. Denney - Suwanee GA, US
Henry Samueli - Corona Del Mar CA, US
Sean F. Nazareth - Anaheim Hills CA, US
Feng Chen - Irvine CA, US
Fang Lu - Irvine CA, US
Christopher R. Jones - Newport Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04J001/00

US Classification:

370480, 370497, 375222

Abstract:

A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems located different distances from the headend. The power transmission level, slot timing, and equalization of the cable modems are set by a ranging process. Data is transmitted by the modems in fragmented form. Various measures are taken to make transmission from the cable modems robust. The upstream data transmission is controlled to permit multiple access from the cable modems.

US Patent:

7103065, Sep 5, 2006

Filed:

Nov 16, 2000

Appl. No.:

09/714713

Inventors:

Thomas J. Quigley - Lawrenceville GA, US
Jonathan S. Min - Buena Park CA, US
Lisa V. Denney - Suwanee GA, US
Henry Samueli - Corona Del Mar CA, US
Sean F. Nazareth - Anaheim Hills CA, US
Feng Chen - Irvine CA, US
Fang Lu - Irvine CA, US
Christopher R. Jones - Newport Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04J 3/16
H04J 3/24

US Classification:

370465, 370474

Abstract:

A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems located different distances from the headend. The power transmission level, slot timing, and equalization of the cable modems are set by a ranging process. Data is transmitted by the modems in fragmented form. Various measures are taken to make transmission from the cable modems robust. The upstream data transmission is controlled to permit multiple access from the cable modems.