Patents Represented by Attorney, Agent or Law Firm Joanne Rossi
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Patent number: 7820060Abstract: Synergistic mixtures of haloamines and their use to control the growth of microorganisms in aqueous systems are disclosed. The method of using the synergistic mixtures entails adding an effective amount of a monohaloamine and an effective amount of a dihaloamine to an aqueous system.Type: GrantFiled: August 24, 2006Date of Patent: October 26, 2010Assignee: Hercules IncorporatedInventors: Michael J. Mayer, Freddie L. Singleton
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Patent number: 7270727Abstract: Sized paper containing an amphoteric promoter resin that is a polymerization reaction product of a quaternary diallylammonium monomer, optionally a diallylammonium monomer, and an unsaturated organic acid is described. The method of sizing paper with such amphoteric promoter resin compound and a sizing agent provides sized paper with significantly improved sizing property characteristics, and the sized paper exhibits superior retention of brightness due to added optical brighteners.Type: GrantFiled: April 28, 2003Date of Patent: September 18, 2007Assignee: Hercules IncorporatedInventor: Daniel F. Varnell
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Patent number: 7271308Abstract: The present invention relates to embodiments for a process for the isomerization of at least one alpha olefin to an internal olefin via a multi-step process resulting in a mixture comprising alkene isomers and a low level of oligomers. According to the present invention an alkylaluminum compound is used in combination with the Group VIII transition metal salt for interaction with the latter, and thereby generating catalytically active species for the isomerization of 1-alkenes to internal alkenes, wherein this mixture is subsequently combined with an acid washed clay.Type: GrantFiled: October 19, 2004Date of Patent: September 18, 2007Assignee: Hercules IncorporatedInventor: Jian Jian Zhang
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Patent number: 7008545Abstract: Synergistic mixtures of biocides and their use to control the growth of microorganisms in aqueous systems are disclosed. The method of using the synergistic mixtures entails adding an effective amount of a nitrogenous compound activated by an oxidant and at least one non-oxidizing biocide to an aqueous system. The amount of activated nitrogenous compound and non-oxidizing biocide is selected to result in a synergistic biocidal effect.Type: GrantFiled: October 8, 2002Date of Patent: March 7, 2006Assignee: Hercules IncorporatedInventors: John M. Cronan, Jr., Michael J. Mayer
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Patent number: 6667384Abstract: The present invention contemplates poly(aminoamide) pre-polymers, polyamide polymers, a multi-step process for the synthesis of these pre-polymers and polymers using acrylates and at least one monomer containing at least two primary amines, and the resins resulting from the reaction of the polymers with an epihalohydrin. These resins may be used as wet strength resins and creping aids in the papermaking industry as well as surface additives for wool.Type: GrantFiled: December 27, 2001Date of Patent: December 23, 2003Assignee: Hercules IncorporatedInventors: Qu-Ming Gu, Armin Michel, Huai Nan Cheng, William W. Maslanka, Ronald R. Staib
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Patent number: 6624298Abstract: Esterified polysaccharides and the process of making such products are disclosed. The process can be enzymatic where an enzyme is used as a catalyst for the reaction. The process can also be chemical where no enzyme is used. Novel Products are obtained through lipase-catalyzed &bgr;-lactone ring opening alcoholysis of ketene dimers and the process of making such compositions containing products.Type: GrantFiled: February 6, 2002Date of Patent: September 23, 2003Assignee: Hercules IncorporatedInventors: Huai N. Cheng, Qu Ming Gu
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Patent number: 6554961Abstract: Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes that treat resins. A composition containing a polyamine-epihalohydrin resin which includes CPD-forming species can be treated with at least one agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 2 weeks at 50° C., and a pH of about 2.5 to 3.5 contains less than about 250 ppm dry basis of CPD. The invention is also directed to a gelation storage stable reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin, when stored at pH 1 for 24 hours at 50° C. and measured at 24 hours, produces less than about 1000 ppm dry basis of CPD.Type: GrantFiled: June 12, 2000Date of Patent: April 29, 2003Assignee: Hercules IncorporatedInventors: Richard James Riehle, Anthony J. Allen, Michaela Hofbauer, Alfred Jacques Haandrikman, Ronald Busink, Mark T. Crisp, John James Hoglen, Huai Nan Cheng, Francis J. Carlin, Jr., John Arthur Lapre, Harold Jabloner
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Patent number: 6547971Abstract: Methods of inhibiting the growth of organisms in aqueous systems such as papermaking systems, cooling systems and process waters of various types, comprises adding to the aqueous system a hop acid. Compositions comprising hop acids and papermaking suspensions or slurries, and/or additives, such as paper making additives, are also provided.Type: GrantFiled: March 8, 2000Date of Patent: April 15, 2003Assignee: Hercules IncorporatedInventors: Alexander W. Breen, John M. Cronan, Jr., Phillip S. Davis, Michael J. Mayer, Freddie L. Singleton
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Patent number: 6528643Abstract: Product of esterified polysaccharides and the process of making such product. The process can be enzymatic where an enzyme is used as a catalyst for the reaction. The process can also be chemical where no enzyme is used. Novel products are obtained through lipase-catalyzed &bgr;-lactone ring opening alcoholysis of ketene dimers and the process of making such compositions containing products.Type: GrantFiled: May 5, 2000Date of Patent: March 4, 2003Assignee: Hercules IncorporatedInventors: Huai N. Cheng, Qu Ming Gu
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Patent number: 6527915Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. Whey proteins are added to the pulp or applied to deposition prone surfaces of a papermaking system.Type: GrantFiled: March 22, 2001Date of Patent: March 4, 2003Assignee: Hercules IncorporatedInventor: Qu-Ming Gu
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Patent number: 6428654Abstract: Use of strobilurins and oudemansins as biocides in aqueous systems is disclosed. Uses include wet-lap preservation, mold proofing, mildew proofing, and other uses where anti-fungal and/or anti-mildew activity is desired. Aqueous systems treatable with strobilurins and/or oudemansins include pulp and paper systems, oil and gas systems, cooling towers, and heat exchangers.Type: GrantFiled: April 5, 2000Date of Patent: August 6, 2002Assignee: Hercules IncorporatedInventors: John M. Cronan, Jr., Howard A. Cash
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Patent number: 6405582Abstract: A method and apparatus for determining the deposition of organic and inorganic contaminants, such as biofilm, on a coupon is disclosed. The method and apparatus include a coupon suspended from a weight sensor within a reservoir tank. The reservoir tank includes fluid inlet means for receiving a fluid sample which flows over the surface of the coupon for a predetermined period of time to allow contaminants present in the fluid sample to deposit on the coupon surface. At regular intervals, the reservoir tank is drained and the coupon is allowed to dry and is weighed. The weight of the contaminants which have deposited on the surface of the coupon is determined by comparing the weight of the coupon to its previous weight. In this manner, a computer system attached to the weight sensor can analyze a series of weights and present the results in a time-deposit graph.Type: GrantFiled: September 7, 2000Date of Patent: June 18, 2002Assignee: Hercules IncorporatedInventor: Helmut Boettcher
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Patent number: 6248844Abstract: A polyester is provided which facilitates the separation of blood into light and heavy phases via centrifugation in a blood collection vessel. The polyester is useful as a component of a partitioning composition formulated to have appropriate specific gravity to be positioned intermediate the light and heavy blood phases during centrifugation. The polyester composition can be prepared with relative ease compared to prior art polyesters useful in blood partitioning compositions. The polyesters of this invention comprise a dicarboxylic acid member, a polymeric fatty acid, a diol member and a moiety having at least one polymerizable carbon—carbon double bond and at least one functional group capable of reacting with the ends of the polyester chain. The polyesters have a lower viscosity when synthesized and are later cured to increase their viscosity to the desired level.Type: GrantFiled: June 4, 1999Date of Patent: June 19, 2001Assignee: Henkel CorporationInventors: Jeffrey A. Gates, Michael S. Sharp