Chin Fang Chen

US Patent:

7013084, Mar 14, 2006

Filed:

Feb 28, 2001

Appl. No.:

09/795252

Inventors:

Abdella Battou - Silver Spring MD, US
Moon W. Kim - Pleasanton CA, US
Anastasios Tzathas - Howell NJ, US
David H. Walters - Rockville MD, US
Mario F. Alvarez - Beachwood NJ, US
David M. Brooks - Crofton MD, US
I. Michael Mandelberg - Baltimore MD, US
Chin J. Chen - Rockville MD, US

Assignee:

Lambda OpticalSystems Corporation - Reston VA

International Classification:

H04J 14/00

US Classification:

398 45, 398 50, 398 51, 398 54, 398 56

Abstract:

A hierarchical and distributed control architecture for managing an optical communications network. The architecture includes a line card manager level for managing individual line cards in an optical switch, a node manager level for managing multiple line cards in an optical switch/node, and a network management system level for managing multiple optical switches/nodes in a network. An event manager at the node manager level enables software components that are running at the node manager to register for and receive events, and to post events. The events may be triggered, e. g. , by a change in a status of the switch, or an alarm condition. Control architecture functionalities include signaling, routing, protection switching and network management. Furthermore, the network management function includes a topology manager, a performance manager, a connection manager, a fault detection manager, and a configuration manager.

US Patent:

59859407, Nov 16, 1999

Filed:

Feb 17, 1998

Appl. No.:

9/025714

Inventors:

Maria B. Manek - Stafford TX
Chin Hai Chen - Sugar Land TX
Roberto G. Presenti - W. University TX
Hernando Diaz-Arauzo - Sugar Land TX

Assignee:

Nalco/Exxon Energy Chemicals, L.P. - Naperville IL

International Classification:

C10G 912
C10G 916
F17D 116

US Classification:

516 31

Abstract:

A method is disclosed for mitigating fouling and reducing viscosity in primary fractionators and quench sections of ethylene plants by adding to a hydrocarbon stream a mono and/or a polyalkyl-substituted phenol-formaldehyde resin having a weight average molecular weight of from about 1,000 to about 30,000 and at least one alkyl substituent containing from about 4 to about 24 carbon atoms, which alkyl substituent may be linear or branched.