Patents Represented by Attorney David Edwards
  • Patent number: 6221428
    Abstract: A fiberized asphalt-type composition and method for increasing the structural stability and durability of fiber-reinforced asphalt-type surfaces without increasing concentration or length of fiber, by addition of an active amount of a special class of bicomponent fibers.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: April 24, 2001
    Assignee: Hercules Incorporated
    Inventor: James P. Modrak
  • Patent number: 6217903
    Abstract: A pharmaceutical composition has a blend of at least first and second components and a medicament in a sufficient amount to be therapeutic where the first component is ethylcellulose (EC) and the second component is at least one other polymer selected from the group consisting of methylcellulose (MC), ethylhydroxyethylcellulose (EHEC), hydroxyethylmethylcellulose (HEMC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydrophobically modified ethylhydroxyethylcellulose (HMEHEC), carboxymethylhydroxyethylcellulose (CMHEC), carboxymethyl hydrophobically modified hydroxyethylcellulose (CMHMHEC), guar, pectin, carrageenan, agar, algin, gellan gum, acacia, starch and modified starches, mono- and co-polymers of carboxyvinyl monomers, mono- and co-polymers of acrylate or methacrylate monomers, mono- and co-polymers of oxyethylene and oxypropylene and mixtures thereof. The medicament can be a variety of drugs or nutritional supplements.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: April 17, 2001
    Assignee: Hercules Incorporated
    Inventor: George William Skinner
  • Patent number: 6210710
    Abstract: A pharmaceutical composition has a blend of at least first and second components and a medicament in a sufficient amount to be therapeutic where the first component is selected from hydroxypropylcellulose (HPC), ethylcellulose (EC), or derivatives of HPC, EC, and hydroxyethylcellulose (HEC) and the second component is at least one other polymer. When HPC is the first component, hydroxypropylmethylcellulose (HPMC), HEC, or carboxymethylcellulose will not be the second component and when EC is the first component, HPMC will not be the second component. The medicament can be a variety of drugs or nutritional supplements. The pharmaceutical composition releases the medicament for a prolonged or sustained period of time and can be formulated into many dosage forms.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: April 3, 2001
    Assignee: Hercules Incorporated
    Inventor: George William Skinner
  • Patent number: 6165534
    Abstract: A food composition having a softening point of at least about 115.degree. F., and composed of an emulsion and a chemically set gel. The emulsion is prepared from water and a fat; the chemically set gel is prepared from a carbohydrate and water.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: December 26, 2000
    Assignee: Hercules Incorporated
    Inventors: Gary Andrew Luzio, Anne Elizabeth Tieleman
  • Patent number: 6162877
    Abstract: A comb copolymer comprising a backbone comprising (a) hydrophilic units, (b) residues of dihalogeno compound remaining after the halogen atoms have been removed and (c) moiety containing pendant hydrophobe, such copolymer being particularly well suited as thickener for latex paints.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: December 19, 2000
    Assignee: Hercules Incorporated
    Inventor: Arjun C. Sau
  • Patent number: 6121439
    Abstract: A coating composition is composed of a water-soluble polysaccharide composition comprising at least one hydrophobic group selected from aryl, alkyl, alkenyl, aralkyl and mixtures thereof and at least one quaternary ammonium salt group, both connected to a polysaccharide backbone by covalent bonds. This coating is used for improving the leveling of waterborne paints.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: September 19, 2000
    Assignee: Hercules Incorporated
    Inventor: Gijsbert Kroon
  • Patent number: 6117546
    Abstract: A yarn comprising linear low density polyethylene fiber and nonmelting fiber or fiber having a melting point higher than the linear low density polyethylene fiber, and structures made therefrom.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: September 12, 2000
    Assignee: Hercules Incorporated
    Inventors: James D. Geiman, Rakesh K. Gupta, Randall E. Kozulla, Richard J. Legare, Robert G. MacLellan
  • Patent number: 6083492
    Abstract: A solid stick, underarm product composition is composed of a liquid vehicle, an antiperspirant salt, a dibenzylidene alditol gelling agent, and a co-gelling agent of a hydrophobically modified water soluble polysaccharide polymer which comprises a water soluble polysaccharide polymer backbone, a hydrophobic moiety of C.sub.8 -C.sub.24 alkyl, aryl alkyl, alkyl aryl groups and mixtures thereof, wherein the hydrophobic moiety is present in an amount up to the amount which renders said polysaccharide less than 1% by weight soluble in water, and dibenzylidene alditol, antiperspirant active and a liquid vehicle. This underarm product can be either clear or hazy.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: July 4, 2000
    Assignee: Hercules Incorporated
    Inventor: Jashawant J. Modi
  • Patent number: 6068696
    Abstract: A mortar cement composition is composed of a cement or ground portland cement clinker, ground limestone and/or lime, sand, a sufficient amount of water to render the composition flowable, and at least one water-soluble polymer present in the amount having a lower limit of about 0.001 wt % and an upper limit of about 0.04 wt % based on total dry weight of the ingredients, with the proviso that the extent of adsorption of the polymer onto the cement is less than 50%, and wherein the resulting mortar has 8-16% air content and greater than 70 psi flexural bond strength. This mortar cement composition is for use in building structures in all seismic zones.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: May 30, 2000
    Assignee: Hercules Incorporated
    Inventors: Arthur L. Anttila, Sung G. Chu, Thomas J. Podlas, Teng-Shau Young
  • Patent number: 6054511
    Abstract: Hydroxyethylcellulose (HEC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydroxypropylcellulose (HPC), methylhydroxypropylcellulose (MHPC), carboxymethylhydroxyethylcellulose (CMHEC), guar, starch, xanthan, hydroxypropylguar (HP Guar) or carboxymethylhydroxypropylguar (CMHP Guar) are stepwise or continuously reacted with hydrogen peroxide to produce aqueous compositions with a solids content greater than 5% by weight at a viscosity at 25.degree. C. below 9500 mPa.s. It is preferred to use 30-50% hydrogen peroxide to depolymerize the polysaccharide.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: April 25, 2000
    Assignee: Aqualon Company
    Inventors: J David Angerer, Jashawant Jamanadas Modi, Robert C Szafranski
  • Patent number: 6030443
    Abstract: A paper coating composition has therein an optical brightening agent (OBA) and a water-soluble non-ionic polysaccharide derivative, exhibiting a solution viscosity in water of less than 1500 cps when dissolved at 5% polymer concentration, wherein the paper coating provides improved optical brightness as compared to the same formulation without said non-ionic, polysaccharide derivative. A paper coated with this composition has an optical brightness value of greater than 70.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: February 29, 2000
    Assignee: Hercules Incorporated
    Inventors: Eric F. Bock, Charles L. Burdick, L. Drake Walsh
  • Patent number: 6025311
    Abstract: A stable fluid polymer suspension is composed of at least one water soluble polysaccharide polymer in an aqueous carrier fluid in which the polysaccharide polymer does not significantly swell or dissolve where the polysaccharide polymer in the aqueous carrier fluid has the measured properties of:i) rendering the polymer(s) insoluble, resulting in a cloudy dispersion,ii) limiting the swelling of insolubilized polymer(s), leading to a polymer sediment volume of a 1 weight percent polymer dispersion to less than 1%, andiii) preventing phase separation for at least one week.This invention also Includes a method of preparing the stable fluid polymer suspension having the above mentioned measured properties. The stable aqueous fluid suspension of this invention is a clear, odorless, and stable formulation and is used in cosmetics, personal care, and household products.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: February 15, 2000
    Assignee: Aqualon Company
    Inventors: Mary Theresa Clarke, Teng-Shau Young
  • Patent number: 5962353
    Abstract: A sanitary ceramic glaze with improved drying and leveling properties contains a thickening amount of a hydrophobically modified hydroxyethylcellulose with a M.S. of 1.5 to 4.5 and a weight percent hydrophobic modification between 0.1 and 2.0.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: October 5, 1999
    Assignee: Hercules Incorporated
    Inventors: Dieter Schweizer, Claudia Sorg
  • Patent number: 5922119
    Abstract: The invention is directed to the use of an aqueous protective coating composition containing a binder system and an associative thickener for industrial coatings. The associative thickener is not a polyurethane thickener and is selected so that its concentration required by the specific application method is below the critical concentration C*, defined as the thickener concentration at which the coils of the thickener polymer start to overlap of entangle calculated according to the Mark Houwink equation.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: July 13, 1999
    Assignee: Hercules Incorporated
    Inventor: Kroon Gijsbert
  • Patent number: 5872246
    Abstract: A process is provided for making alkylated galactomannans comprising reacting a galactomannan in the presence of sodium hydroxide, water, and an alkyl halide to form a reaction mass under pressure and at temperatures greater than 50.degree. C. in amounts and for a time sufficient to achieve a degree of substitution greater than 2.4. Organic volatiles from the reaction mass are stripped and the reaction mass is then washed in water at temperatures high enough to prevent dissolution or agglomeration of the alkylated galactomannan. This washed product is then dried and pulverized to suitable particle size. This product is useful in applications requiring thickening and rheology modification of formulations containing organic solvents or formation of coatings/film from organic solvents. The products are also useful in pharmaceutical applications.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: February 16, 1999
    Assignee: Aqualon Company
    Inventors: J. Richard Commander, Thomas George Majewicz
  • Patent number: 5830266
    Abstract: An alcohol-free and encapsulated nitrocellulose which is primarily suitable for printing inks, varnishes and coatings consists of 65-75% nitrocellulose, 3-8% water, 10-15% non-solvating plasticizer and 10-15% of an active solvent suitable for both nitrocellulose and the plasticizer. A product is produced by drying water-wet nitrocellulose and spraying on a solution of plasticizer in solvent. Upon blending to a uniform consistency, the nitrocellulose becomes partially dissolved and encapsulated within the plasticizer/solvent mixture. The advantages of the invention are improved safety indicated by a lower rate of burning and reduced environmental pollution wherein the product is alcohol-free such that no additional alcohol recovery system is required.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: November 3, 1998
    Assignee: Aqualon Company
    Inventors: Akber Ali Khanshab, William R. Zacher
  • Patent number: 5795928
    Abstract: A process is provided for preparing an acrylic copolymer latex having improved mechanical and shear stability comprising emulsion polymerizing at least one ethylenically unsaturated monomer having up to 23 carbons in the presence of, by weight based on the total monomer content, a) from about 0.05% to about 5.0% of a protective colloid with a molecular weight of less than 75,000, and b) from about 0.01% to about 1.5% of at least one water soluble free radical polymerization initiator. This latex provides coating manufacturers the flexibility of either eliminating surfactants altogether from coating or to use small amounts thereof.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: August 18, 1998
    Assignee: Hercules Incorporated
    Inventors: Bernardus J. W. Janssen, Gijsbert Kroon, Dirk Kruythoff, Willemina G. Salomons
  • Patent number: 5688923
    Abstract: A polyvalent cation crosslinked pectin fiber composition is composed of a calcium sensitive low methoxyl pectin with a degree of esterification (DE) of less than 15% or calcium sensitive amidated pectin having a DE of less than 50% where the pectin is polyvalent cation crosslinkable and has an average molecular weight (MW) having an upper limit of 200,000 and a lower limit of 5000. This pectin is useful in making wound dressings for topical applications.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: November 18, 1997
    Assignee: Hercules Incorporated
    Inventors: Timothy C. Gerrish, Gary A. Luzio
  • Patent number: 5645731
    Abstract: A method is provided for using an aqueous suspension of at least 15% of poly(ethylene oxide)(PEO) as a flocculent. PEO is dispersed in an aqueous solution of at least one salt selected from the group consisting of sodium or potassium formate, sodium or potassium hydroxide, sodium or potassium citrate, sodium or potassium acetate, sodium chloride or mixtures thereof to form a poly(ethylene oxide) suspension having at least 15% of poly(ethylene oxide) by total weigh.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: July 8, 1997
    Assignee: Hercules Incorporated
    Inventors: Charles Lee Burdick, Elliott Echt
  • Patent number: 5641533
    Abstract: A no and low fat mayonnaise or mayonnaise like composition includes a continuous aqueous phase containing a semi-gelled system comprising a non-amidated or amidated galacturonic acid methyl ester with a degree of esterification below 55% (LM pectin) to replace part or all of the fat in order to make a mayonnaise that has organoleptic characteristics that imitates real mayonnaise.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: June 24, 1997
    Assignee: Hercules Incorporated
    Inventor: Hans Christian Ambjerg Pedersen