Michael L Chen

US Patent:

6449251, Sep 10, 2002

Filed:

Apr 2, 1999

Appl. No.:

09/285127

Inventors:

Amr A. Awadallah - Stanford CA
Michael Chen - Cupertino CA
David Li - Stanford CA
Manu Thapar - Freemont CA

Assignee:

Nortel Networks Limited - St. Laurent

International Classification:

H04L 1256

US Classification:

370229, 370412, 370465, 709103, 709235, 709244, 713100, 713201

Abstract:

A packet mapper prioritizes streams of data packets in a computer network, each data packet having a packet header containing feature values descriptive of the data packet. The packet mapper includes a mapping table that associates application-related features with network-reserved feature values from a range of feature values reserved for use by selected network data packet streams, and a feature value mapper that performs at least one of (i) in each packet header having an application-related feature value associated with a network-reserved feature value, substituting the associated network-reserved feature value for the application-related feature value, and (ii) in each packet header having a network-reserved feature value associated with an application-related feature value, substituting the associated application-related feature value for the network-reserved feature value.

US Patent:

6476173, Nov 5, 2002

Filed:

Nov 7, 2000

Appl. No.:

09/707650

Inventors:

Chon-Yie Lin - Houston TX
Michael Chia-Chao Chen - Houston TX
Aspy Keki Mehta - Humble TX
Rajan K. Chudgar - League City TX

Assignee:

Exxon Mobil Chemical Patents Inc. - Houston TX

International Classification:

C08F11006

US Classification:

526351, 526160, 526943, 525240, 525242

Abstract:

This invention relates to isotactic propylene homopolymer compositions obtained from metallocene catalysis wherein the polymer has a molecular weight distribution (Mw/Mn) in the range of from about 2. 5 to about 20. The isototic propylene homopolymer composition may be prepared in a multiple stage polymerization process using the same metallocene component in at least two stages.

US Patent:

6576306, Jun 10, 2003

Filed:

Mar 6, 2001

Appl. No.:

09/800239

Inventors:

Aspy K. Mehta - Humble TX
Michael C. Chen - Houston TX
James J. McAlpin - Houston TX
Anthony N. Speca - Kingwood TX
Kelly Tormaschy - Round Rock TX
Chon Y. Lin - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

B32B 108

US Classification:

428 355, 428 357, 525240, 526348, 5263481

Abstract:

This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional propylene polymer.

US Patent:

6583227, Jun 24, 2003

Filed:

Mar 6, 2001

Appl. No.:

09/800238

Inventors:

Aspy K. Mehta - Humble TX
Michael C. Chen - Houston TX
James J. McAlpin - Houston TX
Anthony N. Speca - Kingwood TX
Kelly Tormaschy - Round Rock TX
Chon Y. Lin - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 2314

US Classification:

525240, 526348, 526943

Abstract:

This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional propylene polymer.

US Patent:

6784269, Aug 31, 2004

Filed:

Jun 20, 2002

Appl. No.:

10/177073

Inventors:

Chon Y. Lin - Houston TX
Michael C. Chen - Houston TX
Aspy K. Mehta - Humble TX
Rajan K. Chudgar - League City TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F21006

US Classification:

5263481, 526351, 526160, 526943

Abstract:

This invention relates to propylene homopolymer compositions obtained from metallocene catalysis wherein the polymer has a molecular weight distribution (Mw/Mn) in the range of from 4. 0 to 20. The propylene homopolymer composition may be prepared in a multiple stage polymerization process using the same metallocene component in at least two stages. The composition may comprise isotactic homopolymer in one embodiment, and have a hexane extractables of less than 2 wt % in one embodiment. The composition is useful in making films.

US Patent:

6806316, Oct 19, 2004

Filed:

Nov 25, 2002

Appl. No.:

10/303448

Inventors:

Aspy Keki Mehta - Humble TX
Michael Chia-Chao Chen - Houston TX
Chon-Yie Lin - Houston TX
James John McAlpin - Houston TX
Anthony Nicholas Speca - Kingwood TX
Kelly Tormaschy - Bellaire TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 2300

US Classification:

525240

Abstract:

This invention relates generally to crystalline polypropylene polymers and methods for their production. Specifically, this invention relates to crystalline polypropylene polymer compositions comprising both propylene homopolymers and propylene copolymers. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymers and copolymers using propylene with a small amount of comonomer, preferably ethylene. The resulting polymers are excellent for use in the production of biaxially oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional polypropylene polymers.

US Patent:

6809168, Oct 26, 2004

Filed:

Apr 2, 2003

Appl. No.:

10/406036

Inventors:

Pawan Kumar Agarwal - Houston TX
Weiqing Weng - Houston TX
Aspy K. Mehta - Humble TX
Armenag H. Dekmezian - Kingwood TX
Main Chang - Houston TX
Rajan K. Chudgar - League City TX
Olivier Jean Georjon - Brussels, BE
Chon-Yie Lin - Houston TX
Michael C. Chen - Bellaire TX
Galen C. Richeson - Kingwood TX
Palanisamy Arjunan - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F23620

US Classification:

526336, 526126, 526127, 526131, 526134, 526160, 526165, 526339

Abstract:

The co-polymerization reaction of one or more olefin monomers, such as propylene, with ,-diene units and the resulting copolymers are provided. More specifically, the copolymer may have from 90 to 99. 999 weight percent of olefins and from 0. 001 to 2. 000 weight percent of ,-dienes. The copolymer may have a weight average molecular weight in the range from 50,000 to 2,000,000, a crystallization temperature in the range from 115Â C. to 135Â C. and a melt flow rate in the range from 0. 1 dg/min to 100 dg/min. These copolymers may be employed in a wide variety of applications, the articles of which include, for example, films, fibers, such as spunbonded and meltblown fibers, fabrics, such as nonwoven fabrics, and molded articles. The copolymer may further include at least two crystalline populations. Desirably, the melting point range of one of the crystalline populations is distinguishable from the melting point range of another crystalline population by a temperature range of from 1Â C.

US Patent:

6857024, Feb 15, 2005

Filed:

Aug 21, 2000

Appl. No.:

09/643321

Inventors:

Michael C. Chen - San Jose CA, US
Jan Fandrianto - Los Gatos CA, US
Steve Toteda - San Francisco CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F015/16
H04M015/00

US Classification:

709231, 37911413

Abstract:

A system and method are disclosed in which an initiating caller using a station connected to a data network receives advertisement information while waiting for a call to complete between the station and the receiving party. The station connects with a server that can access a database storing a plurality of advertisement information. The station includes a user interface, which allows the caller to interact with the station, and a flow controller, which monitors the bandwidth available to receive information from the server system.