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David T. Williamson
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Chesterfield, VA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Compositions of polyesters and fibrous clays
Patent number
9,040,615
Issue date
May 26, 2015
E I du Pont de Nemours and Company
David T. Williamson
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Preparation of polyamide block copolymers
Patent number
8,691,894
Issue date
Apr 8, 2014
E I du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Decarboxylating block copolymers
Patent number
8,362,106
Issue date
Jan 29, 2013
E I du Pont de Nemours and Company
Kalindi Dogra
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Nanocomposite compositions of polyamides and sepiolite-type clays
Patent number
8,198,355
Issue date
Jun 12, 2012
E. I. Du Pont de Nemours and Company
David T. Williamson
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Preparation of polyamide block copolymers
Patent number
8,063,169
Issue date
Nov 22, 2011
E. I. Du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymerization of cyclic amides using N-heterocyclic carbene and me...
Patent number
7,635,747
Issue date
Dec 22, 2009
E. I. Du Pont de Nemours and Company
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymerization of macrocyclic polyester oligomers using N-heterocyc...
Patent number
7,622,543
Issue date
Nov 24, 2009
E. I. Du Pont de Nemours and Company
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymerization of macrocyclic polyester oligomers at elevated tempe...
Patent number
7,557,157
Issue date
Jul 7, 2009
E. I. Du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymerization of macrocyclic polyester oligomers using metal amide...
Patent number
7,550,531
Issue date
Jun 23, 2009
E. I. Du Pont de Nemours and Company
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Ring opening polymerization of cyclic amides using N-heterocyclic c...
Patent number
7,514,499
Issue date
Apr 7, 2009
E. I. Du Pont de Nemours and Company
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Rapidly crystallizing polycarbonate composition
Patent number
7,504,472
Issue date
Mar 17, 2009
E. I. du Pont de Nemours Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Polymerization of macrocyclic polyester oligomers using N-heterocyc...
Patent number
7,488,772
Issue date
Feb 10, 2009
E. I. Du Pont de Nemours and Company
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Patents Applications
last 30 patents
Information
Patent Application
COMPOSITIONS OF POLYESTERS AND FIBROUS CLAYS
Publication number
20120292812
Publication date
Nov 22, 2012
E.I. du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
PREPARATION OF POLYAMIDE BLOCK COPOLYMERS
Publication number
20120062228
Publication date
Mar 15, 2012
E.I. du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Nanocomposite compositions of polyamides and Sepiolite-type clays
Publication number
20100324195
Publication date
Dec 23, 2010
E.I. du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
DECARBOXYLATING BLOCK COPOLYMERS
Publication number
20100273931
Publication date
Oct 28, 2010
E.I. du Pont de Nemours and Company
Kalindi Dogra
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
FACILATATED DISPERSION OF NANOFILLERS FOR THE PREPARATION OF NANOCO...
Publication number
20090192254
Publication date
Jul 30, 2009
E.I. du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
POLYESTER CLAY NANOCOMPOSITES FOR BARRIER APPLICATIONS
Publication number
20090186179
Publication date
Jul 23, 2009
E.I. du Pont de Nemours and Company
DAVID T. WILLIAMSON
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
PROCESS FOR THE PRODUCTION OF POLYESTER NANOCOMPOSITES
Publication number
20080315453
Publication date
Dec 25, 2008
Michael Joseph Molitor
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
Facilatated Dispersion of Nanofillers for the Preparation of Nanoco...
Publication number
20080261062
Publication date
Oct 23, 2008
E.I. du Pont de Nemours and Company
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
PREPARATION OF POLAMIDE BLOCK COPOLYMERS
Publication number
20070293629
Publication date
Dec 20, 2007
DAVID T. WILLIAMSON
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Polymerization of macrocyclic polyester oligomers using N-heterocyc...
Publication number
20070252311
Publication date
Nov 1, 2007
Wilson Tam
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
Polyester nanocomposite filaments and fiber
Publication number
20070173585
Publication date
Jul 26, 2007
Gregory James Sevenich
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Application
Rapidly crystallizing polycarbonate composition
Publication number
20060276580
Publication date
Dec 7, 2006
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Compositions of polyesters and sepiolite-type clays
Publication number
20060205856
Publication date
Sep 14, 2006
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Toughened polyester compositions
Publication number
20060157350
Publication date
Jul 20, 2006
David T. Williamson
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Application
Polyester clay nanocomposites for barrier applications
Publication number
20060141183
Publication date
Jun 29, 2006
David T. Williamson
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Polymerization of cyclic amides using N-heterocyclic carbene and me...
Publication number
20060096699
Publication date
May 11, 2006
Wilson Tam
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
Polymerization of macrocyclic polyester oligomers using metal amide...
Publication number
20060100363
Publication date
May 11, 2006
Wilson Tam
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
Ring opening polymerization of cyclic amides using N-heterocyclic c...
Publication number
20060100365
Publication date
May 11, 2006
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Ring opening polymerization of cyclic amides using metal amide and...
Publication number
20060100414
Publication date
May 11, 2006
Wilson Tam
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Polymerization of macrocyclic polyester oligomers using N-heterocyc...
Publication number
20060100362
Publication date
May 11, 2006
Wilson Tam
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
Polymerization of macrocyclic polyester oligomers at elevated tempe...
Publication number
20060100364
Publication date
May 11, 2006
David T. Williamson
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL