Robert G Nickol

US Patent:

6433161, Aug 13, 2002

Filed:

Apr 29, 1997

Appl. No.:

08/841036

Inventors:

H. N. Cheng - Wilmington DE
Robert G. Nickol - Hockessin DE
George Wang - Miami FL
Jun Li - Miami FL

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C07B 3700

US Classification:

536114, 536120, 536123, 5361231, 536124, 514 54, 435 14, 435 72, 435 74

Abstract:

Galactosylated hydroxyalkyl polysaccharides wherein galactose moieties are bound to the hydroxyalkyl polysaccharide by galactosidic bonds, and a process for preparing the galactosylated hydroxyalkyl polysaccharides having the steps: a) providing at least one hydroxyalkyl polysaccharide; and b) treating said hydroxyalkyl polysaccharide with a galactose donor in the presence of galactosidase enzyme for a time sufficient to convert at least a portion of said hydroxyl groups to galactosides.

US Patent:

6528644, Mar 4, 2003

Filed:

Sep 26, 2001

Appl. No.:

09/963191

Inventors:

Peng George Wang - Troy MI
Wenhua Xie - Westland MI
Lei Qiao - Downington PA
Robert G. Nickol - Hockessin DE
Huai N. Cheng - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C07H 100

US Classification:

536124, 536 111, 536 41, 5361231, 536102, 536107, 536 69, 435 74, 435101

Abstract:

A product of acetoacetylated saccharide and the process of making such a product. The process is enzymatic where an enzyme is used as a catalyst for the reaction. The enzymatic process provides better yields and milder process conditions compared to other chemical synthesis process without any enzyme.

US Patent:

48410403, Jun 20, 1989

Filed:

Dec 9, 1987

Appl. No.:

7/131053

Inventors:

Ernst K. Just - Wilmington DE
Robert G. Nickol - Wilmington DE

Assignee:

Aqualon Company - Wilmington DE

International Classification:

C08B 3106

US Classification:

536105

Abstract:

A novel phosphated, oxidized starch having a molecular weight of about 1,500 to about 40,000 Daltons, a carboxyl degree of substitution of 0. 30 to 0. 96, and a phosphate degree of substitution of from about 0. 002 to about 0. 005, which is useful as a dispersant for aqueous, high-solid slurries of minerals and inorganic pigments, as a replacement for gum arabic in gumming and fountain solutions for lithography, and as a drilling fluid additive.

US Patent:

6159721, Dec 12, 2000

Filed:

Aug 20, 1997

Appl. No.:

8/919190

Inventors:

Huai Nan Cheng - Wilmington DE
Qu-Ming Gu - Wilmington DE
Robert G. Nickol - Hockessin DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C12N 950
C08B 3706

US Classification:

435219

Abstract:

Amine modified pectins wherein the amine is a water soluble amine, amino acid, etc. and process to catalyze the reaction of water soluble polymers having alkoxyester and carboxylic acid functionality, such as polysaccharides, with a primary or secondary amine in the presence of a protease and water.

US Patent:

47071893, Nov 17, 1987

Filed:

Jun 10, 1986

Appl. No.:

6/873108

Inventors:

Robert G. Nickol - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C08L 108
C08L 126
C08L 500

US Classification:

106176

Abstract:

Disclosed is an essentially water-free biostable composition comprising at least one anionic water-soluble polymer containing carboxylate or sulfonate groups and small amounts of at least one cationic quaternary ammonium salt surfactant in a ratio, expressed as moles surfactant divided by mole equivalents of carboxylate or sulfonate groups in the polymer, of from about 0. 025 to about 2. 0 is provided, which is capable of forming highly viscoelastic solutions when mixed in an aqueous medium. By altering the ratio of cationic surfactant to anionic polymer within the specific ratio range, the viscosity of the aqueous solutions of the composition can be adjusted to a desired level. The aqueous solutions thereof are useful as thickeners in aqueous-based systems, such as latex paints and shampoos.