Biocidal Patents (Class 162/161)
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Publication number: 20040178142Abstract: Disclosed is an integrated paper wherein the paper has capabilities and functionalities provided by both the fiber and the active agent ingredients, and a method of immobilizing the active agents within the integrated paper. The tight pore structure of the integrated paper of the present invention, a mean pore diameter of less than about 2 microns, provides short diffusion distances from a fluid to the surface of the paper ingredients by adsorption or diffusive interception making it an excellent medium for fluid filtration. The integrated paper of the present invention can further include a microbiological interception enhancing agent. The integrated paper can be formed using, preferably, wet laid paper-making processes for speed and efficiency. Also disclosed are devices utilizing the integrated paper useful in fluid filtration.Type: ApplicationFiled: September 19, 2003Publication date: September 16, 2004Inventor: Evan E. Koslow
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Patent number: 6777103Abstract: A fiber cement composite material providing improved rot resistance and durability, the composite material incorporating biocide treated fibrous pulps to resist microorganism attacks. The biocide treated fibers have biocides attached to inner and outer surfaces of individualized fibers to protect the fibers from fungi, bacteria, mold and algae attacks. The biocides selected have strong affinity to cellulose and do not interfere with cement hydration reactions. This invention also discloses the formulation, the method of manufacturing and the final fiber cement products using the biocide treated fibers.Type: GrantFiled: October 2, 2001Date of Patent: August 17, 2004Assignee: James Hardie Research Pty LimitedInventors: Donald J. Merkley, Caidian Luo
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Patent number: 6773822Abstract: A novel gypsum board having antifungal properties is disclosed. The board comprises a gypsum core, front and back paper facings and an antifungal agent effective at inhibiting fungal growth. A preferred antifungal agent is cetyl pyridinium chloride. The antifungal agent can be present in the gypsum core and/or on one or both of the paper facings. In addition, the antifungal agent may be encapsulated in a material that releases the antifungal agent over time and/or upon exposure to moisture. Also disclosed are methods for preparing the aforementioned antifungal gypsum board.Type: GrantFiled: August 1, 2002Date of Patent: August 10, 2004Assignee: Temple-Inland Forest Products CorporationInventor: Charles Capps
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Publication number: 20040149408Abstract: Surface finishing of paper or board by applying an aqueous solution (Lw) of a surface-finishing active ingredient (W) to a hydrophilic paper or board sheet (B),Type: ApplicationFiled: January 22, 2004Publication date: August 5, 2004Applicant: Clariant Finance (BVI) LimitedInventors: Achim Kohler, Gerd Martin, Christian Weigl, Josef Weigl
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Publication number: 20040149409Abstract: A conventional paper product used for printing or for fabrication into envelopes, file folders, forms and the like, is prepared by having antimicrobial agents added into the sizing during the manufacturing process. The antimicrobial agent provides protection to the paper from fungi, mildew and bacteria that could otherwise destroy the paper or be harmful to the user thereof.Type: ApplicationFiled: June 27, 2003Publication date: August 5, 2004Inventors: Fred Klimpl, Ken Sonenberg
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Publication number: 20040084163Abstract: A method for increasing the long term storageability of a cellulosic paper or paperboard product. The method includes providing a paper or paperboard product made from cellulosic fibers having a basis weight ranging from about 80 to about 300 pounds per 3000 square feet. A holdout material is applied to at least one surface of the paper or paperboard product. The web is then coated with an ink receptive material selected from the group consisting of an aqueous acrylic polymer coating material, an aqueous biocidal agent and a combination of aqueous acrylic polymer coating material and aqueous biocidal agent and dried to provide a paper or paperboard product having enhanced long term storageability. Webs made according to the invention are suitable for making file folders which exhibit improve long term storageability by resisting damage from moisture and/or biological activity.Type: ApplicationFiled: October 15, 2003Publication date: May 6, 2004Inventors: Sandeep Kulkarni, Yuan Ling, Rick Williams, Victor P. Holbert
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Publication number: 20040079499Abstract: Discrete particles of cellulosic material are flowable and meterable. They are easily dispersible in an aqueous or a dry medium. The particles comprise singulated cellulose fibers that have been densified. The particles have a density of at least 0.3 g/cc.Type: ApplicationFiled: October 25, 2002Publication date: April 29, 2004Inventors: Ramon C. Dezutter, Michael R. Hansen
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Publication number: 20040074621Abstract: A method for reducing a production of a slime in a papermaking process is provided. The method includes steps of adding a dispersing agent into the slime to obtain a first mixture, mixing and culturing the mixture, adding an antagonistic into the first mixture to obtain a second mixture, mixing and culturing the second mixture for reducing the production of the slime, and re-adding the antagonistic into the mixed and cultured second mixture after a specific time period for further reducing the production of the slime.Type: ApplicationFiled: December 31, 2002Publication date: April 22, 2004Applicant: Yuen Foong Yu Paper MFG Co., Ltd.Inventor: Jihn-Yuh Wang
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Publication number: 20040060677Abstract: A method of manufacturing a multi-purpose functional agricultural mulching paper is disclosed. The method comprises steps of (a) providing a papermaking material, (b) treating the papermaking material to form a cleaned paper pulp, and (c) adding at least one functional additive into the cleaned paper pulp and treating the cleaned paper pulp to form the multi-purpose functional agricultural mulching paper. The multi-purpose functional agricultural mulching paper of the present invention can be applied in week control, pest control, bacterial control, plant disease control, growing seedling, fertilizer supply and seed sowing to increase the economic benefits.Type: ApplicationFiled: September 27, 2002Publication date: April 1, 2004Inventor: Ching-Chung Huang
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Publication number: 20040055719Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with didecyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: ApplicationFiled: September 17, 2003Publication date: March 25, 2004Inventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 6680127Abstract: A novel gypsum board having antifungal properties is disclosed. The board comprises a gypsum core, front and back paper facings and an antifungal agent effective at inhibiting fungal growth. A preferred antifungal agent is cetylpyridinium chloride. The antifungal agent can be present in the gypsum core and/or on one or both of the paper facings. In addition, the antifungal agent may be encapsulated in a material that releases the antifungal agent over time and/or upon exposure to moisture. Also disclosed are methods for preparing the aforementioned antifungal gypsum board.Type: GrantFiled: September 17, 2002Date of Patent: January 20, 2004Assignee: Temple-Inland Forest Products, CorporationInventor: Charles L. Capps
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Publication number: 20030155090Abstract: The invention relates to a process for controlling microbial growth in a production line for cellulosic products with the aid of gases. The invention also relates to the use of gases such as carbon dioxide, nitrogen, argon and/or non-naturally occurring mixtures thereof for controlling microbial growth. In the process an aqueous material containing water and suspended pulp fibers and/or additives therefor is treated with the gaseous inhibitor to significantly retard or inhibit the growth of microorganisms therein. An oxygen rich gas may be introduced in addition to the inhibitor of the invention.Type: ApplicationFiled: February 25, 2003Publication date: August 21, 2003Inventors: Anna Holmberg, Hannu Leino, Pia Kontola, Pirjo Puutonen
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Publication number: 20030127207Abstract: A method for forming an antimicrobially-treated fabric is provided. The method includes forming a solution from a liquid and an antimicrobial agent, such as 3-(trimethoxysilyl)propyloctadecyldimethyl ammonium chloride. In one embodiment, a cellulosic fibrous material is combined with the solution while in the pulper to form a liquid suspension such that the antimicrobial agent becomes substantive to the cellulosic fibrous material. A web is formed from the antimicrobially-treated cellulosic fibrous material such that substantially all of the cellulosic fibrous material present within the web is derived from the antimicrobially-treated cellulosic fibrous material. In one embodiment, the web of antimicrobially-treated fibrous material is also hydraulically entangled with a nonwoven substrate. In some embodiments, when dried, the antimicrobial agent forms a covalent bond with the cellulosic fibrous material.Type: ApplicationFiled: October 12, 2001Publication date: July 10, 2003Applicant: Kimberly-Clark Worldwide, Inc.Inventors: James W. Clark, Shawn E. Jenkins
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Patent number: 6585858Abstract: An apparatus for calendering a sheet material web being carried on or between one or more carrier fabrics. In a preferred embodiment, the apparatus includes a calender section having first and second calender rolls forming a nip therebetween. At least one carrier fabric is disposed between the first and second calender rolls. The first and second calender rolls apply a load to the carrier fabric and sheet material web as they pass through the nip between the calender rolls so as to reduce the caliper, or thickness, of the sheet material web. A method for calendering the sheet material web includes carrying the sheet material web on one or more carrier fabrics through the calender nip formed by the first and second calender rolls and applying a load to the carrier fabric, and sheet material carried thereby, so as to reduce the thickness of the sheet material web.Type: GrantFiled: September 25, 2000Date of Patent: July 1, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Kurt T. Otto, James M. Perkins
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Patent number: 6569229Abstract: The present invention relates to an aqueous formulation containing phenol and/or phenol derivatives having a low freezing point and anti-microbial activity.Type: GrantFiled: July 31, 2001Date of Patent: May 27, 2003Assignee: Omya AGInventors: Matthias Buri, Patrick Schwarzentruber
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Publication number: 20030079846Abstract: A multi-purpose paper, a manufacturing method thereof, and an application thereof are provided. The method of manufacturing the multi-purpose paper comprises steps of (a) providing a papermaking material and obtaining a clean paper pulp by treating the papermaking material, (b) adding at least one functional additive into the clean paper pulp to form the multi-purpose paper, and (c) processing the multi-purpose paper to form thereon an uneven surface structure. The cultivating paper has the combined functions of weed control, pest control, supplying the required nutrients to plants to help develop the root system, maintaining moisture and breath for the root system. The multi-purpose paper can be carriers of agricultural antagonistic microorganisms and serve as the basic functional substrate for weed control, pest control, sowing, growing seedlings, fertilization, fertilizer saving, manpower saving and organic cultivating.Type: ApplicationFiled: October 26, 2001Publication date: May 1, 2003Applicant: Yuen Foong Yu Paper MFG Co., LTDInventor: Ching-Chung Huang
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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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Publication number: 20030041983Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with didecyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: ApplicationFiled: August 27, 2002Publication date: March 6, 2003Applicant: Weyerhaeuser CompanyInventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 6478972Abstract: A method of controlling microbial fouling is provided. The method controls microbial fouling using hypobromous acid, HOBr, formed by the reaction between an aqueous solution of alkali or alkaline earth metal hypochlorite and a bromide ion source. The method is characterized in that the alkali or alkaline earth metal hypochlorite or/and the bromide ion source is/are stabilized by the addition of a stabilizer before the hypobromous acid is formed by the reaction there between.Type: GrantFiled: June 28, 2000Date of Patent: November 12, 2002Assignee: Acculab Co., Ltd.Inventors: Sang Hea Shim, Chung Soo Kim
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Patent number: 6455125Abstract: A method for manufacturing a paper core material is described. The paper core material has uses such as in the building industry and has the advantage that no toxic home syndrome is caused in a newly built house or office. The paper core material has a continuous geometric pattern such as rectangular or hexagonal cells and is made by the method of providing a plurality of base paper strips, bending and gluing the base paper strips to form the paper core material having a continuous geometric pattern, treating the paper core material with a charcoal solvent comprising activated carbon dust, wood vinegar and a flame-resisting agent, and drying the paper core material. An alternate method is provided which involves treating the base paper strips with the charcoal solvent, drying the base paper strips, and then bending and gluing the base paper strips to form the paper core material having a continuous geometric pattern.Type: GrantFiled: February 22, 2000Date of Patent: September 24, 2002Assignee: Dice Core CorporationInventor: Michiko Morishita
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Publication number: 20020108730Abstract: 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 antifungal 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: ApplicationFiled: April 5, 2000Publication date: August 15, 2002Inventors: John M. Cronan, Jr., Howard A. Cash
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Patent number: 6432262Abstract: A method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin, to the solution (or slurry). The inventors have discovered that aldehyde donors significantly reduce the decomposition of hydrogen peroxide by catalase and other peroxide decomposing enzymes, which are often present in recycled paper. As a result, less hydrogen peroxide needs to be added to a solution to effectively bleach organic matter in the solution. Furthermore, aldehyde donors are safe to handle and cost effective. Another embodiment is a method of bleaching recycled papers in a circulating water slurry comprising organic matter. The method comprises adding hydrogen peroxide and an aldehyde donor to the slurry.Type: GrantFiled: June 8, 2001Date of Patent: August 13, 2002Assignee: Lonza, Inc.Inventors: Bill Ney, Richard Sinden, Philip Gerdon Sweeny, Patrick Jay Lutz, Olga Borokhov
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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: 6395189Abstract: A process is provided for both removing and controlling biofilms present in industrial cooling and process waters. The process provides a composition which includes the reaction products of an amino base, a formaldehyde, an alkylenepolyamine, and the ammonium salt of an inorganic or organic acid. The composition may be used to remove existing biofilms from process water equipment. Further, lower maintenance dosages may be used to maintain the equipment in a substantially biofilm-free condition.Type: GrantFiled: November 21, 2000Date of Patent: May 28, 2002Assignee: Polymer Ventures, Inc.Inventors: Jon O. Fabri, Walter D. Heslep
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Patent number: 6387217Abstract: The present invention is a method for maximizing water removal from an absorbent web in a press nip. The present invention uses a pressing unit having a blanket with a void volume and with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web. The improved pressure profile according to the present invention results in increased water removal and/or improved line speed. The void volume further increases water removal and/or improves line speed.Type: GrantFiled: November 12, 1999Date of Patent: May 14, 2002Assignee: Fort James CorporationInventors: Steven L. Edwards, Robert J. Marinack, Jeffrey Charles McDowell, Gary L. Worry
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Publication number: 20020007926Abstract: A cellulose fiber having extended biostability and the method of its manufacture are described. While prior treatments of cellulose with biotoxic metal compounds have given improved resistance to decay, these treatments have not been entirely satisfactory where the fiber had to be refined before use. Refining energy was very high and fiber length loss was substantial. Treatment of cellulose fiber with didecyldimethylammonium chloride (DDAC) or bromide (DDAB), these materials in combination with low levels of copper, or low levels of copper alone, has given a product with very good biostability without a major increase in refining energy or loss of fiber length. The treated fiber is particularly advantageous as a reinforcing component for cement board products.Type: ApplicationFiled: April 19, 2001Publication date: January 24, 2002Inventors: Richard A. Jewell, Julie A. Reimer
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Patent number: 6319356Abstract: A method of inhibiting the autooxidation of fatty acids in a paper product made from pulp fiber is accomplished by adding to the pulp fiber between about 1 mole/metric ton and about 25 moles/metric ton, preferably between about 2 moles/metric ton and about 10 moles/metric ton of an oxidizing halogen.Type: GrantFiled: May 12, 1999Date of Patent: November 20, 2001Assignee: Great Lakes Chemical CorporationInventors: Frank Durkes, Walter Dubach
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Stable oxidizing bromine formulations, method of manufacture and uses thereof for biofouling control
Patent number: 6287473Abstract: Stable oxidizing bromine compounds are prepared by preparing a caustic solution comprising a halogen stabilizer, water and an alkali or alkaline earth metal hydroxide, the halogen stabilizer being selected from the group consisting of R—NH2, R—NH—R1, R—SO2—NH2, R—SO2—NHR1, R—CO—NH2, R—CO—NH—R1 and R—CO—NH—CO—R1 wherein R is a hydroxy group, an alkyl group or an aromatic group and R1 is an alkyl group or an aromatic group, adding bromine chloride to the solution while mixing the solution, and cooling the solution.Type: GrantFiled: March 3, 2000Date of Patent: September 11, 2001Assignee: Nalco Chemical CompanyInventors: Shunong Yang, William F. McCoy, Anthony W. Dallmier -
Patent number: 6241898Abstract: A treatment for inhibiting the microbial adhesion on surfaces in contact with an aqueous system is disclosed, which comprises adding to the system the combination of an alkylsulfosuccinate surfactant and a block copolymer.Type: GrantFiled: March 16, 1998Date of Patent: June 5, 2001Assignee: BetzDearborn Inc.Inventors: J. Barry Wright, M. Christine Johnson
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Patent number: 6224768Abstract: The subject-matter of the present invention is a filter paper for laden liquids, with a high adsorption and absorption capacity. This paper, based on cellulose fibers, is filled with organic and/or inorganic pulverulent matter. The powder filling is adapted in quantity and quality to the liquid to be filtered. It finds its application in petrochemical, agri-foodstuffs and papermaking industries.Type: GrantFiled: December 10, 1997Date of Patent: May 1, 2001Assignees: Elf Antar France, AhlstromInventors: Francois-Pierre Navarre, Bernard Bossand, Pierre Girard, Joseph Dussaud
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Patent number: 6221211Abstract: A multi-ply tissue contains an internal indicia, such as a printed pattern applied to the center ply, which is visible through the outer plies of the tissue and which indicates the presence of some unique ingredients within the tissue product.Type: GrantFiled: February 4, 1994Date of Patent: April 24, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: David Henry Hollenberg, Patricia Mary Exarhos, Brigitte Kay Weigert, Lorrie Lynn Krynock
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Patent number: 6183603Abstract: This invention relates to calendering systems. Such structures of this type, generally, employ the use of hard and soft nips to provide excellent smoothness without gloss mottle.Type: GrantFiled: March 12, 1999Date of Patent: February 6, 2001Assignee: Westvaco CorporationInventors: Stephen Nicholson, Steven Herman Parker, Domenick Larry Raschella, Sharon Rae Stampfl
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Patent number: 6149822Abstract: A process is provided for both removing and controlling biofilms present in industrial cooling and process waters. The process provides a composition which includes the reaction products of an amino base, a formaldehyde, an alkylenepolyamine, and the ammonium salt of an inorganic or organic acid. The composition may be used to remove existing biofilms from process water equipment. Further, lower maintenance dosages may be used to maintain the equipment in a substantially biofilm-free condition.Type: GrantFiled: March 1, 1999Date of Patent: November 21, 2000Assignee: Polymer Ventures, Inc.Inventors: Jon O. Fabri, Walter D. Heslep
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Patent number: 6103131Abstract: The invention relates to a method to inhibit bacteria from adhering to a submergible surface. The method contacts the submergible surface with an effective amount of at least one sulfamic acid or salt thereof to inhibit bacterial adhesion to the submergible surface. The invention also relates to a method for controlling biofouling of an aqueous system. This method adds an effective amount of at least one sulfamic acid or salt thereof to inhibit bacteria from adhering to a submerged surface within the aqueous system. This method effectively controls biofouling without substantially killing the fouling organisms. The sulfamic acid used in the method of the invention has the formula R.sup.1 R.sup.2 NS(O).sub.2 (OH). In this formula, R.sup.1 and R.sup.2 are independently a hydrogen, a C.sub.4 -C.sub.20 alkyl group or a cyclohexyl group. However, R.sup.1 and R.sup.2 are not both hydrogen. Alternatively, R.sup.1 and R.sup.Type: GrantFiled: July 29, 1997Date of Patent: August 15, 2000Assignee: Buckman Laboratories International Inc.Inventors: Thomas E. McNeel, Marilyn S. Whittemore, Stephen D. Bryant, Graciela H. Vunk
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Patent number: 6096225Abstract: A method is disclosed for controlling biofouling in an aqueous medium by treating the aqueous medium with an oil-in-water emulsion comprising an antimicrobial oil phase and at least one emulsifier. This method efficiently controls biofouling in the aqueous medium by specifically targeting the antimicrobial oil phase directly to biofilms, cell surfaces and cell aggregates in a concentrated form.Type: GrantFiled: September 11, 1998Date of Patent: August 1, 2000Assignee: Nalco Chemical CompanyInventors: Shunong Yang, Michael V. Enzien, May M. Wu, William F. McCoy
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Patent number: 6080323Abstract: A method is disclosed for removing biofilms from surfaces submerged in a fouled water system by adding to the water system an alkyl polyglycoside having the chemical formula: ##STR1## wherein R is a C.sub.8 -C.sub.16 alkyl chain and DP is from 0 to 3 carbohydrate units.Type: GrantFiled: February 17, 1999Date of Patent: June 27, 2000Assignee: Nalco Chemical CompanyInventors: F. Philip Yu, Anthony W. Dallmier
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Patent number: 6077445Abstract: A method to minimize corrosion in aqueous systems while maintaining microbiological control in such systems is disclosed. This is achieved by regulating the feed of oxidizers with an oxidation-reduction potential (ORP) signal, while incorporating corrosion information provided by an on-line corrosion meter.Type: GrantFiled: March 3, 1998Date of Patent: June 20, 2000Assignee: BetzDearborn Inc.Inventor: Charles R. Ascolese
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Patent number: 6054054Abstract: The inventors have discovered a new method of treating paper machine white water aqueous systems and surfaces in the paper machine white water aqueous systems that prevents or inhibits the adhesion of bacterial cells to the surfaces and thereby controls the biological fouling of the surfaces. The process comprises adding to the aqueous system an adhesion-inhibiting amount of vinyl cationic polymer. This method effectively inhibits the adhesion of the bacterial cells to exposed surfaces without killing the fouling organisms and also without harming non-target organisms. In addition, the method of the present invention advantageously does not cause the formation of harmful substances in the effluent from the systems treated.Type: GrantFiled: March 30, 1995Date of Patent: April 25, 2000Assignee: Nalco Chemical CompanyInventors: Linda R. Robertson, Michael R. St. John
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Patent number: 6007726Abstract: Stable oxidizing biocide formulations containing bromine are provided for biofouling control in industrial water systems. The formulations contain at least one stable oxidizing bromine compound that is prepared from at least one oxidizing chemical reagent, at least one bromine source and at least one bromine or halogen stabilizer. The resulting products are a mixture of stable oxidizing bromine compounds that can be used as a primary or secondary biocide in an industrial water system.Type: GrantFiled: April 29, 1998Date of Patent: December 28, 1999Assignee: Nalco Chemical CompanyInventors: Shunong Yang, William F. McCoy
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Patent number: 5972691Abstract: Process for making polyamine-epihalohydrin resin products having very low levels of epihalohydrin or epihalohydrin hydrolyzates, particularly useful in papermaking, which includes, amongst other features, producing a polyamine-epihalohydrin polymer in aqueous solution, terminating the reaction by cooling, adjusting the pH of the polyamine-epihalohydrin solution to from about 7.5 to about 11 and concurrently heating the solution to about 35 to about 50.degree. C., and contacting the aqueous solution with selected microorganisms or an enzyme, and deactivating or removing the enzymes or microbes, cooling to about 20.degree. C. and stabilizing the composition by adjusting the pH to about 2.0 to 5.0 by the addition of acid.Type: GrantFiled: June 7, 1995Date of Patent: October 26, 1999Assignee: Hercules IncorporatedInventors: Robert Bates, Harvey J. Branton, David J. Hardman, Gary K. Robinson
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Patent number: 5900111Abstract: The invention relates to a process for sanitizing post-consumer wastepaper fibers for liquid packages and containers, a paper product for food packaging and a liquid food container. The process comprises providing paper fibers from a wastepaper recycle process, adding water to the paper fibers to achieve a slurry, de-watering the slurry to obtain a paper fiber stream and passing the fiber stream through a mixing device while heating the fiber stream and supplying hydrogen peroxide in the mixing device.Type: GrantFiled: October 21, 1997Date of Patent: May 4, 1999Assignee: Tetra Laval Holdings & Finance S.A.Inventors: Tommy Nystrom, Hyder Ali, Fritz Lembke
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Patent number: 5888405Abstract: The invention relates to a method to inhibit bacteria from adhering to a submergible surface. The method contacts the submergible surface with an effective amount of at least one amino methyl phosphonic acid or salt thereof to inhibit bacterial adhesion to the submergible surface. The invention also relates to a method for controlling biofouling of an aqueous system. This method adds an effective amount of at least one amino methyl phosphonic acid or salt thereof to inhibit bacteria from adhering to a submerged surface within the aqueous system. This method effectively controls biofouling without substantially killing the fouling organisms. The amino methyl phosphonic acid used in the methods of the invention has the formula R.sup.1 R.sup.2 NCH.sub.2 P(O)(OH).sub.2. In this formula, R.sup.1 and R.sup.2 are independently a C.sub.6 -C.sub.20 alkyl group or a CH.sub.2 P(O)(OH).sub.2 group. However, R.sup.1 and R.sup.2 are not both a CH.sub.2 P(O)(OH).sub.2 group. Alternatively, R.sup.1 and R.sup.Type: GrantFiled: July 29, 1997Date of Patent: March 30, 1999Assignee: Buckman Laboratories International Inc.Inventors: Thomas E. McNeel, Marilyn S. Whittemore, Stephen D. Bryant, Graciela H. Vunk
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Patent number: 5874453Abstract: Compositions comprising a mixture of 2-(thiocyanomethylthio)benzothiazole and methylene-bis(thiocyanate) with dimethylamide of a carboxylic acid are disclosed which are synergistically effective compared to the respective components alone in controlling the growth of microorganisms in or on a product, material, or medium. Methods to control the growth of microorganisms and prevent spoilage caused by microorganisms with the use of the compositions of the present invention are also disclosed.Type: GrantFiled: July 11, 1997Date of Patent: February 23, 1999Assignee: Buckman Laboratories International, inc.Inventors: David Oppong, Vanja M. King
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Patent number: 5789239Abstract: The present invention relates to the use of at least one enzyme component from the group consisting of carbohydrases, proteases, lipases and glycol proteases and a short-chained glycol component for the avoidance of slime formation and/or for the removal of biofilm on surfaces of water-bearing systems, in particular of industrial process-water systems. The enzyme component(s) and the glycol component can be added to the water-bearing system either separately, i.e. at different points, or in the form of an enzymatic composition containing the enzyme component(s) and the glycol component.Type: GrantFiled: December 4, 1996Date of Patent: August 4, 1998Assignee: BetzDearborn Inc.Inventors: Mark Emile Eyers, Kristine Laura Ignatius Van Pee, Jozef Van Poele, Jurgen Friedrich Schuetz, Achim Paul Schenker
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Patent number: 5789326Abstract: A binder is applied to fibers to bind particles to the fibers. The fibers have hydrogen bonding functional groups. The particles have functional groups capable of forming a hydrogen bond or a coordinate covalent bond. The binder comprises binder molecules, the binder molecules having at least one functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with the particles, and at least one functional group that is capable of forming a hydrogen bond with the fibers. A substantial portion of the particles that are adhered to the fibers are adhered in particulate form by hydrogen bonds or coordinate covalent bonds to the binder, and the binder is in turn adhered to the fibers by hydrogen bonds. Fibers containing particles bound by this method are easily densified.Type: GrantFiled: November 19, 1996Date of Patent: August 4, 1998Assignee: Weyerhaeuser CompanyInventors: Michael R. Hansen, Richard H. Young, Sr.
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Patent number: 5783091Abstract: Algicides are added to water for the algicidal treatment of the water, especially swimming-pool water. The disadvantages of known methods can be avoided or reduced if chlorohexidine or a salt thereof is used as algicide. Chlorohexidine and its salts are distinguished by a broad spectrum of algicidal action at very low concentrations of use.Type: GrantFiled: May 13, 1996Date of Patent: July 21, 1998Assignee: Degussa AktiengesellschaftInventors: Peter Werle, Jolanta Holinej, Antje Rueckriegel
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Patent number: 5736056Abstract: A treatment for enhancing the activity of biocidal compounds to control the growth of microbes in an aqueous system is disclosed, which comprises adding to said compounds an effective amount of an alkylsulfosuccinate surfactant.Type: GrantFiled: January 15, 1997Date of Patent: April 7, 1998Assignee: BetzDearborn Inc.Inventors: J. Barry Wright, Daniel Michalopoulos
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Patent number: 5702605Abstract: A novel bacterium that can produce an enzyme having a wide specificity and being capable of decomposing slimes originating in various molds, yeasts and the like, more particularly, a novel bacterium of the genus Cellulomonas. The enzyme solution prepared by using the above bacterium is excellent in the effects of decomposition and prevention of formation of mold slime and can be applied for controlling slimes in industrial water, such as white water in the papermaking industry or cooling water, removing slime from separative membranes, preventing sludge bulking, washing garbage cages in a kitchen sink, and preserving wood.Type: GrantFiled: January 28, 1997Date of Patent: December 30, 1997Assignee: Sanyo Chemical Industries, Ltd.Inventor: Katsuyuki Hatanaka
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Patent number: 5656177Abstract: The present invention relates to oil-in-water emulsions for the prevention of slime formation and for the reduction of microbial growth in water carrying systems. The emulsions comprise as component of the oil phase at least one of the following active substances:a saturated or unsaturated, open-chain normal or isomeric hydrocarbon having 8-30 carbon atoms.The emulsions have a proportion of the oil phase of 1 to 90 %-wt. and are used in an amount of 1 to 200 ppm and are free of toxic microbiocides.Type: GrantFiled: November 30, 1994Date of Patent: August 12, 1997Assignee: Chemische Fabrik Stockhausen GmbHInventor: Joachim Werres
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Patent number: 5626720Abstract: A method for the control of pitch in an aqueous system used in pulp or paper making is disclosed which comprises adding to the system, or to the pulp making or paper making machinery, a water soluble polymer derived from (a) an epihalohydrin, a diepoxide or a precursor of an epihalohydrin or diepoxide, (b) an alkyl amine having a functionality with respect to an epihalohydrin of 2 and (c) an amine which has a functionality with respect to an epihalohydrin greater than 2 and which does not possess any carbonyl groups.Type: GrantFiled: May 19, 1995Date of Patent: May 6, 1997Assignee: W.R. Grace & Co.-Conn.Inventor: Thord Gustav G. Hassler