Patents Represented by Attorney David Edwards
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Patent number: 6221428Abstract: 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: GrantFiled: August 25, 2000Date of Patent: April 24, 2001Assignee: Hercules IncorporatedInventor: James P. Modrak
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Patent number: 6217903Abstract: 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: GrantFiled: June 30, 1999Date of Patent: April 17, 2001Assignee: Hercules IncorporatedInventor: George William Skinner
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Patent number: 6210710Abstract: 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: GrantFiled: April 28, 1997Date of Patent: April 3, 2001Assignee: Hercules IncorporatedInventor: George William Skinner
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Patent number: 6165534Abstract: 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: GrantFiled: October 4, 1994Date of Patent: December 26, 2000Assignee: Hercules IncorporatedInventors: Gary Andrew Luzio, Anne Elizabeth Tieleman
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Patent number: 6162877Abstract: 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: GrantFiled: December 4, 1998Date of Patent: December 19, 2000Assignee: Hercules IncorporatedInventor: Arjun C. Sau
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Patent number: 6121439Abstract: 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: GrantFiled: July 27, 1998Date of Patent: September 19, 2000Assignee: Hercules IncorporatedInventor: Gijsbert Kroon
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Patent number: 6117546Abstract: 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: GrantFiled: October 8, 1997Date of Patent: September 12, 2000Assignee: Hercules IncorporatedInventors: James D. Geiman, Rakesh K. Gupta, Randall E. Kozulla, Richard J. Legare, Robert G. MacLellan
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Patent number: 6083492Abstract: 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: GrantFiled: December 17, 1998Date of Patent: July 4, 2000Assignee: Hercules IncorporatedInventor: Jashawant J. Modi
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Patent number: 6068696Abstract: 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: GrantFiled: July 20, 1998Date of Patent: May 30, 2000Assignee: Hercules IncorporatedInventors: Arthur L. Anttila, Sung G. Chu, Thomas J. Podlas, Teng-Shau Young
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Patent number: 6054511Abstract: 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: GrantFiled: January 15, 1993Date of Patent: April 25, 2000Assignee: Aqualon CompanyInventors: J David Angerer, Jashawant Jamanadas Modi, Robert C Szafranski
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Patent number: 6030443Abstract: 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: GrantFiled: April 29, 1999Date of Patent: February 29, 2000Assignee: Hercules IncorporatedInventors: Eric F. Bock, Charles L. Burdick, L. Drake Walsh
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Patent number: 6025311Abstract: 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: GrantFiled: December 17, 1993Date of Patent: February 15, 2000Assignee: Aqualon CompanyInventors: Mary Theresa Clarke, Teng-Shau Young
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Patent number: 5962353Abstract: 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: GrantFiled: February 12, 1993Date of Patent: October 5, 1999Assignee: Hercules IncorporatedInventors: Dieter Schweizer, Claudia Sorg
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Patent number: 5922119Abstract: 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: GrantFiled: March 27, 1998Date of Patent: July 13, 1999Assignee: Hercules IncorporatedInventor: Kroon Gijsbert
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Patent number: 5872246Abstract: 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: GrantFiled: October 17, 1994Date of Patent: February 16, 1999Assignee: Aqualon CompanyInventors: J. Richard Commander, Thomas George Majewicz
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Patent number: 5830266Abstract: 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: GrantFiled: December 20, 1991Date of Patent: November 3, 1998Assignee: Aqualon CompanyInventors: Akber Ali Khanshab, William R. Zacher
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Patent number: 5795928Abstract: 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: GrantFiled: November 3, 1995Date of Patent: August 18, 1998Assignee: Hercules IncorporatedInventors: Bernardus J. W. Janssen, Gijsbert Kroon, Dirk Kruythoff, Willemina G. Salomons
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Patent number: 5688923Abstract: 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: GrantFiled: February 15, 1996Date of Patent: November 18, 1997Assignee: Hercules IncorporatedInventors: Timothy C. Gerrish, Gary A. Luzio
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Patent number: 5645731Abstract: 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: GrantFiled: August 26, 1996Date of Patent: July 8, 1997Assignee: Hercules IncorporatedInventors: Charles Lee Burdick, Elliott Echt
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Patent number: 5641533Abstract: 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: GrantFiled: August 9, 1995Date of Patent: June 24, 1997Assignee: Hercules IncorporatedInventor: Hans Christian Ambjerg Pedersen