David Lee Simpson

US Patent:

6346599, Feb 12, 2002

Filed:

May 10, 2000

Appl. No.:

09/486255

Inventors:

Daniel Goldberg - Bordentown NJ
Sandra A. Kupperblatt - Flanders NJ
Robert F. Eaton - Belle Mead NJ
Wong F Ark - Bridgewater NJ
David M Simpson - Murfreesboro TN

Assignee:

Union Carbide Chemicals Plastics Technology Corporation - Danbury CT

International Classification:

C08G 6308

US Classification:

528354, 528355, 528357, 428480, 428338, 428339

Abstract:

Lactone copolymers are disclosed which are polymerized from a first lactone monomer and a second amorphous monomer which is effective to suppress the crystallization of the copolymer. It is disclosed that suppression of the crystallization can provide enhanced mechanical properties in films made from the copolymers. As a result, films prepared from the copolymers of the present invention can have properties rendering them suitable for use as biodegradable trash bags as well as for other uses.

US Patent:

6602598, Aug 5, 2003

Filed:

Dec 7, 1999

Appl. No.:

09/456954

Inventors:

David M. Simpson - Murfreesboro TN
Terry F. Jones - Murfreesboro TN
Charles M. Leonard - Murfreesboro TN

Assignee:

SLS Patent Corporation - Murfreesboro TN

International Classification:

B32B 2732

US Classification:

428355EN, 428213, 428516, 428523

Abstract:

A novel multi-layer stretch film comprising at least 3 layers and having excellent mechanical properties and stretch film performance, comprising at least one outer or skin layer that has little or no cling or blocking characteristics in an unstretched state, but has substantial blocking characteristics when stretched. The stretch wrap films of the present invention have little or no unwind noise when removed from a stretch wrap film roll.

US Patent:

20030117752, Jun 26, 2003

Filed:

Dec 20, 2001

Appl. No.:

10/034216

Inventors:

Stephen Gilbert - Madison AL, US
Qingchuan Li - Madison AL, US
David Simpson - New Market AL, US

International Classification:

H02H007/00

US Classification:

361/018000

Abstract:

A DC/DC converter features a programmable controller in a feedback control loop thereof. The programmable controller enables easy changes to operating parameters by reprogramming the controller's application software. Additionally, the converter features a hardware-implemented fault protection circuit which shuts down the converter's switching transistor upon controller failure.

US Patent:

54328543, Jul 11, 1995

Filed:

Jul 11, 1994

Appl. No.:

8/272967

Inventors:

Kazunari Honjo - Huntsville AL
David L. Simpson - Meridianville AL

Assignee:

Chrysler Corporation - Highland Park MI

International Classification:

H04H 500

US Classification:

381 10

Abstract:

A noise control system for a FM stereo receiver senses the presence of noise outside of the FM stereo transmission bandwidth at an output of a FM detector and uses variations of amplitude of the sensed noise to control stereo channel separation and audio bandwidth control circuits of a stereo decoder circuit of the stereo receiver.

US Patent:

62650556, Jul 24, 2001

Filed:

Oct 13, 1999

Appl. No.:

9/419009

Inventors:

David Simpson - Murfreesboro TN
Terry Jones - Murfreesboro TN

International Classification:

B32B 2732

US Classification:

428213

Abstract:

A novel multi-layer stretch film comprising at least 7 layers and having excellent mechanical properties and stretch film performance, comprising two outer, or skin layers that have moderate to high controlled cling and low blocking characteristics, and at least five internal layers to assist in producing mechanical strength and stretchability. The resins used in the film composition include polypropylene (PP), ethylene propylene copolymers, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), metallocene-catalyzed polyethylene (mPE), very low density polyethylene (VLDPE), and/or ultralow density polyethylene (ULDPE). The resins also may be blended to achieve a desired range of physical or mechanical properties of the final film product.

US Patent:

62973495, Oct 2, 2001

Filed:

Feb 24, 2000

Appl. No.:

9/486256

Inventors:

Daniel Goldberg - Bordentown NJ
Sandra A. Kupperblatt - Flanders NJ
Robert F. Eaton - Belle Mead NJ
Wong F Ark - Bridgewater NJ
David M Simpson - Murfreesboro TN

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C08G 6902
C08G 6308

US Classification:

528310

Abstract:

Condensation copolymers are disclosed which are polymerized from a first monomer which is capable of polymerization by condensation polymerization, e. g. , ring opening lactone polymerization, and a second monomer which is effective to suppress the crystallization of the copolymer. It is disclosed that suppression of the crystallization can provide enhanced mechanical properties in films made from the copolymers. As a result, films prepared from the copolymers of the present invention can have properties rendering them suitable for use as biodegradable trash bags as well as for other uses.