Michael J Samuels

US Patent:

6444108, Sep 3, 2002

Filed:

Jun 9, 2000

Appl. No.:

09/591479

Inventors:

Joel David Citron - Wilmington DE
Michael Robert Samuels - Wilmington DE

Assignee:

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

International Classification:

B01D 6144

US Classification:

204541, 204544, 204530, 204531

Abstract:

A first process involves the partial electrodialysis of a dialkali metal salt of an aromatic hydroxycarboxylic acid or a dicarboxylic acid to produce the approximate monoalkali metal salt and the alkali metal hydroxide. The monoalkali metal salt is then treated with an acid such as a bisulfate to recover the aromatic hydroxycarboxylic acid or dicarboxylic acid. The resulting inorganic salt such as sodium sulfate may then be electrolyzed to sodium bisulfate and NaOH. A second process involves the electrodialysis at elevated temperatures of a (di)alkali metal salt of p-hydroxybenzoic acid produce free p-hydroxybenzoic acid and the alkali metal hydroxide. These are efficient and economical methods for recovering the acid and alkali metal hydroxide values, as well as the parent organic compound, from these dialkali metal salts.

US Patent:

6471844, Oct 29, 2002

Filed:

Apr 6, 2001

Appl. No.:

09/743337

Inventors:

Michael Robert Samuels - Wilmington DE
Ronald M. Yabroff - Wilmington DE

Assignee:

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

International Classification:

B01D 6144

US Classification:

204529, 204530, 204541

Abstract:

Processes are provided for the electrodialysis of a (di)alkali metal salt of an aromatic hydroxycarboxylic acid to produce a free aromatic hydroxycarboxylic acid and the alkali metal hydroxide, in the presence of a selected alkali metal salt. These various embodiments represent efficient and economical methods for recovering the alkali metal hydroxide, as well as the parent organic compound, from these dialkali metal salts. These processes also desirably prevent overvoltage during the electrodialysis.

US Patent:

6929848, Aug 16, 2005

Filed:

Aug 26, 2002

Appl. No.:

10/227998

Inventors:

Michael R. Samuels - Wilmington DE, US
Subhotosh Khan - Midlothian VA, US
Mikhail R. Levit - Richmond VA, US

Assignee:

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

International Classification:

B32B003/00
B32B005/06

US Classification:

428209, 4282974, 4282977, 428901, 174258, 174259

Abstract:

A sheet comprising thermoplastic polymer (TP) and short high tensile modulus fibers, in which the concentration of TP in the middle of the sheet is higher than at the surface of the sheet, useful for making prepregs with a thermoset resin.

US Patent:

6960712, Nov 1, 2005

Filed:

Jan 9, 2003

Appl. No.:

10/339610

Inventors:

Joel David Citron - Wilmington DE, US
Michael Robert Samuels - Wilmington DE, US

Assignee:

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

International Classification:

G10D013/02

US Classification:

844222

Abstract:

Drumsticks made from thermoplastic or thermoset resin compositions containing a reinforcing agent and having certain physical properties are readily formed, have good playing characteristics, and are durable.

US Patent:

7014791, Mar 21, 2006

Filed:

Dec 2, 2003

Appl. No.:

10/726227

Inventors:

Marion G. Waggoner - Landenberg PA, US
Michael Robert Samuels - Wilmington DE, US

Assignee:

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

International Classification:

C09K 19/52
B32B 27/08
C08G 63/60
C08G 63/02

US Classification:

25229901, 428480, 528176, 528193, 528194, 528206, 528302, 528308, 5283086, 25229962, 25229967

Abstract:

Liquid crystalline polymer having repeat units derived from 4,4′-biphenol, terephthalic acid, 2,6-naphthalenedicarboxylic acid, and 4-hydroxybenzoic acid in a limited compositional range have melting points of 400 C. or more, and are useful for molded articles and for films, particularly for uses where good high temperature resistance is needed.

US Patent:

7105106, Sep 12, 2006

Filed:

Jul 11, 2003

Appl. No.:

10/618319

Inventors:

Michael Robert Samuels - Wilmington DE, US
Marion Glen Waggoner - Landenberg PA, US
Julius Uradnisheck - Glen Mills PA, US

Assignee:

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

International Classification:

C09K 19/38
C09K 19/52
C08G 63/16
C08G 63/60
B32B 27/10

US Classification:

25229901, 25229962, 25229967, 428 342, 428480, 524601, 524604, 524605, 525444, 528176, 528193

Abstract:

Thermotropic liquid crystalline polymers are produced by the reaction of a polyester made from an aromatic dicarboxylic acid and a diol, one or more hydroxycarboxylic acids, a stoichiometric excess of an aromatic diol, and a carboxylic acid anhydride. Also disclosed are novel liquid crystalline polymers that may be produced by this process. These liquid crystalline polymers are useful as molding resins and shaped articles thereof are produced. In particular, the articles include films, sheets, containers and portions thereof comprising these LCPs.

US Patent:

7128847, Oct 31, 2006

Filed:

Jul 10, 2003

Appl. No.:

10/617117

Inventors:

Michael Robert Samuels - Wilmington DE, US
Michael Joseph Molitor - Wilmington DE, US

Assignee:

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

International Classification:

C09K 19/52
C09K 19/38
H01R 13/648
C08J 5/08

US Classification:

25229901, 2522995, 2522996, 439607, 524486

Abstract:

Disclosed are liquid crystalline polymer compositions, which are melt moldable, and which contain a perfluorinated polymer, and a particulate aramid, and optionally contain hollow glass or quartz spheres, and which usually have low dielectric constants. They are particularly useful as electrical connectors and substrates for other electronic applications which use high frequency signals.

US Patent:

8269154, Sep 18, 2012

Filed:

May 22, 2006

Appl. No.:

11/438518

Inventors:

Michael Robert Samuels - Wilmington DE, US
Marion Glen Waggoner - Landenberg PA, US
Joel D. Citron - Wilmington DE, US
Roger Moons - Duffel, BE
Charles J. Molnar - Wilmington DE, US

Assignee:

Ticona LLC - Florence KY

International Classification:

H05B 6/80

US Classification:

219730, 219729, 426107

Abstract:

Ovenware for microwave ovens which contain a composition comprising a susceptor and a thermoplastic or thermoset polymer are improved when the composition also has a thermal conductivity of about 0. 7 W/m K. or more. Heat generated by absorption of microwave radiation by the susceptor is more readily conducted to the food being cooked when the thermal conductivity of the composition is high, particularly when the part containing the susceptor is relatively thick. Also described are designs for various pieces of ovenware containing this composition.