Patents Represented by Attorney Roy V. Jackson
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Patent number: 6007906Abstract: Fine paper that is sized with a 2-oxetanone alkaline sizing agent and that does not encounter machine feed problems in high speed converting or reprographic machines, including continuous forms bond paper and adding machine paper, processes for converting the paper into envelopes, continuous forms bond paper and adding machine paper, and paper products of the processes.Type: GrantFiled: August 14, 1997Date of Patent: December 28, 1999Assignee: Hercules IncorporatedInventors: Kyle J. Bottorff, Clement Linus Brungardt, David Howard Dumas, Susan Merrick Ehrhardt, John Charles Gast, Jian-Jian Zhang
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Patent number: 5879814Abstract: A 2-oxetanone sizing agent that is made from fatty acid(s) containing linoleic acid. Paper that is sized with the 2-oxetanone alkaline sizing agent does not encounter machine feed problems in high speed converting or reprographic machines, so the sizing agent is useful for paper including continuous forms bond paper and adding machine paper, processes for converting the paper into envelopes, continuous forms bond paper and adding machine paper.Type: GrantFiled: April 25, 1995Date of Patent: March 9, 1999Assignee: Hercules IncorporatedInventor: Kyle J. Bottorff
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Patent number: 5685815Abstract: Fine paper that is sized with a 2-oxetanone alkaline sizing agent and that does not encounter machine feed problems in high speed converting or reprographic machines, including continuous forms bond paper and adding machine paper, processes for converting the paper into envelopes, continuous forms bond paper and adding machine paper, and paper products of the processes.Type: GrantFiled: February 7, 1994Date of Patent: November 11, 1997Assignee: Hercules IncorporatedInventors: Kyle J. Bottorff, Clement Linus Brungardt, David Howard Dumas, Susan Merrick Ehrhardt, John Charles Gast, Jian-Jian Zhang
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Patent number: 5674358Abstract: Paper and paperboard can be effectively repulped by a composition of nonchlorinated oxidizing agent (persulfates) and a buffer (carbonates) yielding a pH of 7-12. The repulping composition of the present invention is particularly useful in repulping paper containing wet strength resins.Type: GrantFiled: June 7, 1995Date of Patent: October 7, 1997Assignee: Hercules IncorporatedInventor: Herbert H. Espy
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Patent number: 5656699Abstract: A water-soluble drainage-aid composition which is the reaction product of a bifunctional crosslinking agent which may be an epihalohydrin selected from the group consisting of epichlorohydrin or epibromohydrin, a 1,3-dihalo-2-propanol in which "halo" is chloro- or bromo-, or a glycidyl ester of an alkanesulfonic or arenesulfonic acid, and an oligoamide reaction product of a polyalkylene polyamine with a carboxylic acid selected from the group consisting of dicarboxylic acids containing between 5 and 10 carbons and their acyl halides, amides, and esters of alcohols having up to 6 carbon atoms, and tricarboxylic acids containing between 6 and 10 carbon atoms and their acyl halides, amides, and esters of alcohols having up to 6 carbon atoms, with a mole ratio of polyamine to dicarboxylic acid or its functional derivative between 1.Type: GrantFiled: April 18, 1994Date of Patent: August 12, 1997Assignee: Hercules IncorporatedInventors: Sunil Priya Dasgupta, Herbert Hastings Espy
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Patent number: 5525738Abstract: A process is disclosed for the synthesis of alkyl ketene dimers by the dehydrohalogenation of a C.sub.8 -C.sub.22 saturated or unsaturated linear fatty acid halide, comprising reacting the fatty acid chloride with a cyclic tertiary amine in a solvent that is selected from the group consisting of cycloalkanes and alkanes at a temperature of up to 75.degree., mechanically separating tertiary amine hydrochloride salts from alkyl ketene dimer dissolved in the solvent, and recovering the alkyl ketene dimer from the solvent.Type: GrantFiled: March 24, 1994Date of Patent: June 11, 1996Assignee: Hercules IncorporatedInventor: Jian J. Zhang
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Patent number: 5484952Abstract: A process for making an alkyl ketene dimer by the dehydrohalogenation reaction of a C.sub.8 -C.sub.32 aliphatic fatty acid chloride with a tertiary amine in an inert solvent and the product of the process; the solvent comprising at an oxygenated hydrocarbon.Type: GrantFiled: May 5, 1994Date of Patent: January 16, 1996Assignee: Hercules IncorporatedInventors: Timothy F. Nolan, Brian M. Stubbs
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Patent number: 5472570Abstract: A paper-making furnish, comprising poly(paravinyl phenol), also known as poly(hydroxy styrene), in admixture with polyethylene oxide, and a process for retaining fine particles in paper-making comprising adding poly(paravinyl phenol) and polyethylene oxide to a paper-making furnish, are disclosed.Type: GrantFiled: March 24, 1994Date of Patent: December 5, 1995Assignee: Hercules IncorporatedInventor: Elliott Echt
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Patent number: 5456800Abstract: A process for increasing the resistance of the cut edges of liquid packaging board to penetration by hot hydrogen peroxide, comprising adding to an aqueous pulp slurry at a neutral to alkaline pH, either separately or in preblended form an aqueous emulsion of a cellulose-reactive size, a non-cellulose-reactive size selected from the group consisting of waxes, bis-stearamides, and fatty acid derivatives, and a thermosetting resin that is capable of covalent bonding to cellulose fiber and self-cross-linking.Type: GrantFiled: July 19, 1993Date of Patent: October 10, 1995Assignee: Hercules IncorporatedInventors: Anthony C. Tansley, John D. Ballantine
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Patent number: 5433776Abstract: An improvement is disclosed in a method for sizing a paper product of sheeted cellulosic fibers by incorporating into the fibers a ketene dimer size, the improvement involving treating the fibers with an aquasol of positively charged colloidal silica, positively charged colloidal alumina, or positively charged colloidal zirconia containing the ketene dimer size.Type: GrantFiled: October 21, 1994Date of Patent: July 18, 1995Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5341103Abstract: Apparatus for simultaneously generating and measuring a triboelectric charge generated on a strip of flexible sample material includes a stationary rod of insulating material, driving motor for the sample material adapted to move the sample material in frictional contact with the rod, a support rod for maintaining a surface of the sample material in straight-line tangential relationship with the rod, and a static-charge sensor disposed between the stationary rod and the support rod and spaced from the surface of the sample material for measuring a charge on the surface in cooperation with a voltage-measuring device.Type: GrantFiled: June 4, 1992Date of Patent: August 23, 1994Assignee: Hercules IncorporatedInventors: Sunil P. Dasgupta, Blain H. Gingrich, Bernard J. Matyniak, G. Gregory Weaver
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Patent number: 5338807Abstract: A creping aid comprising the reaction product of a polyamide of a dibasic acid or of the ester of an aliphatic dibasic acid and methyl bis(3-aminopropylamine) with epichlorohydrin in a mole ratio of the polyamide to the epichlorohydrin between about 1:0.1 and about 1:0.33, and a composition comprising an aqueous solution of the creping aid.Type: GrantFiled: December 23, 1991Date of Patent: August 16, 1994Assignee: Hercules IncorporatedInventors: Herbert H. Espy, William W. Maslanka
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Patent number: 5338407Abstract: A process for making paper to enhance the dry strength of the paper produced without reducing its softness, that comprises adding to a bleached pulp furnish a mixture of an anionic carboxymethyl guar or a carboxymethyl hydroxyethyl guar with a cationic guar that may be prepared by reacting a natural guar with caustic and subsequently with quaternary ammonium chloride.Type: GrantFiled: December 23, 1991Date of Patent: August 16, 1994Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5318669Abstract: A process for making paper to enhance the dry strength of the paper produced without substantially reducing its softness comprising adding to a bleached pulp furnish, separately or together, (1) an anionic polymer selected from the group consisting of carboxymethyl guar, carboxymethyl bean gum, carboxymethyl hydroxyethyl guar, and a carboxymethyl hydroxypropyl guar, with (2) a cationic polymer selected from the group consisting of a cationic guar, a cationic acrylamide copolymer, a cationic bean gum, a cationic amineepichlorohydrin wet strength resin, and both a cationic wet strength resin and at least one of the other said cationic polymers, a composition for adding to a paper-making pulp slurry comprising the said polymers, a method for making the said composition, and a paper product containing the said composition, are disclosed.Type: GrantFiled: August 14, 1992Date of Patent: June 7, 1994Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5319048Abstract: A new composition of matter that can be substituted as a bulking agent for sugar or starch to reduce the caloric content of foods comprising the polymeric product of the reaction of a water-soluble polyol with a di- or tri-epoxide, in water containing a water-soluble inorganic base that serves as a catalyst, and the process for making it.Type: GrantFiled: December 30, 1991Date of Patent: June 7, 1994Assignee: Hercules IncorporatedInventors: Lawrence C. Carosino, Anthony B. Clayton
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Patent number: 5316623Abstract: A method for imparting wet strength to paper with improved water absorbency, that comprises adding to an aqueous suspension of cellulosic paper stock a neutral or alkaline-curing thermosetting wet-strength resin, a water-soluble polymer containing carboxyl groups or carboxylate ions as their alkali metal or ammonium salts, and a substantially non-thermosetting tertiary-amino polyamide-epichlorohydrin resin.Type: GrantFiled: December 9, 1991Date of Patent: May 31, 1994Assignee: Hercules IncorporatedInventor: Herbert H. Espy
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Patent number: 5292590Abstract: An innerliner for tubeless tires is comprised of at least one barrier layer such as poly(vinylidene chloride) or ethylene--vinyl alcohol copolymer film with each barrier layer sandwiched between two layers of an elastomeric material adhering to the rubber stock employed in the carcass of the tire. The innerliner has the advantage of imparting equal or better air retention properties to the tire with a substantial reduction in the thickness and weight relative to conventional halobutyl rubber innerliners.Type: GrantFiled: July 24, 1992Date of Patent: March 8, 1994Assignee: Hercules IncorporatedInventors: Kuang F. Lin, Daniel W. Klosiewicz, Gregory I. Brodsky
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Patent number: 5275698Abstract: A process for making paper to enhance the softness of the paper produced without reducing its dry strength comprises adding to the pulp slurry as a binder resin a cellulosic polymer that exhibits a cloud point in aqueous solution, and allowing the dissolved polymer to coalesce into fine colloidal particles at a temperature above the cloud point either before or after it is added to the slurry.Type: GrantFiled: March 9, 1992Date of Patent: January 4, 1994Assignee: Hercules IncorporatedInventors: Sunil P. Dasgupta, Herbert H. Espy
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Patent number: 5268232Abstract: A molded article comprising a cross-linked ring-opened polymer produced by the metathesis polymerization of a dicyclopentadiene (DCPD) monomer, which may be dicyclopentadiene (DCPD) or of a mixture of (DCPD) and norbornene group-containing cycloolefins, in the presence of an effective amount of a metathesis polymerization catalyst and a co catalyst that is capable of crosslinking the unsaturated double bonds of the polymer and thereby increasing the crosslink density of the polymer and its T.sub.g, a process for making it, a process for increasing the T.sub.g of the molded article, and uses of the molded article with a high T.sub.g.Type: GrantFiled: October 15, 1991Date of Patent: December 7, 1993Assignee: Hercules IncorporatedInventors: Nitya P. Khasat, John F. L. Newport
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Patent number: 5252754Abstract: Aldoketene dimer sizing agents that can efficiently impart both oil and water sizing properties to paper, of an unsaturated .beta.-lactone structure containing terminal perfluoralkyl groups separated from the ketene moiety by at least three carbon atoms, which may be attached to a halogen other than fluorine or an ether, thioether, amide, tertiary amine, ester, or side chain functionality.Type: GrantFiled: November 18, 1991Date of Patent: October 12, 1993Assignee: Hercules IncorporatedInventor: Kyle J. Bottorff