Patents Assigned to DuBois Chemicals, Inc.
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Publication number: 20240383697Abstract: A conveyor lubricating system includes a lubricant feed line, a lubricant applicator including a lubricant flow regulator and a lubricant brush, and a cantilevered support arm including a first rigid member and a second rigid member connected together by a pivoting joint. The lubricant flow regulator is fluidly connected to the lubricant feed line and the lubricant brush is fluidly connected to the lubricant flow regulator. The lubricant brush includes bristles and a manifold to distribute the conveyor lubricant across a width of the lubricant brush. The first rigid member is secured to the lubricant applicator at an end opposite the pivoting joint and the second rigid member is secured to a stationary support such that the second rigid member is cantilevered over a conveyor and such that the lubricant brush contacts the conveyor. An associated method of applying conveyor lubricant to a conveyor is also provided.Type: ApplicationFiled: February 28, 2024Publication date: November 21, 2024Applicant: Dubois Chemicals, Inc.Inventor: Robert Steven Catroneo, JR.
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Patent number: 11629991Abstract: An aspect ratio flow metering device may comprise a concentrate inlet portion, one or more restricted flow portions of tubing fluidly connected to the concentrate inlet portion, and a metered concentrate outlet portion fluidly connected to the one or more restricted flow portion of tubing. The narrowest part of the one or more restricted flow portions of tubing may each have a length (RL): inner diameter (RID) ratio of at least 10:1. The metered concentrate outlet portion may have an inner diameter (OID) greater than RID. The concentrate inlet portion may have an inner diameter (IID) greater than RID. The aspect ratio flow metering device may be structurally configured to limit flow of a concentrate into a hydrodynamic mixing apparatus. Also disclosed are methods for using the aspect ratio flow metering device to mix fluids.Type: GrantFiled: May 8, 2020Date of Patent: April 18, 2023Assignee: DuBois Chemicals, Inc.Inventor: Brent McCurdy
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Patent number: 10851330Abstract: Methods are provided for improving the papermaking process. In various embodiments, the methods include the application of alkali material in combination with an anionic polymeric dispersant and/or a hydroxyfunctional carboxylic acid to papermaking fabrics such that the application thereof removes contaminants from the papermaking fabrics and improves the drainage of said papermaking fabrics. Such alkali material in combination with an anionic polymeric dispersant and/or a hydroxyfunctional carboxylic acid can be applied as a single aqueous solution, and may further comprise a surfactant.Type: GrantFiled: July 27, 2016Date of Patent: December 1, 2020Assignee: DuBois Chemicals, Inc.Inventors: Harold Laser, Brandon E. Mahler
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Patent number: 10710037Abstract: A chemical component mixing apparatus for use with a fluid source in creation of a concentrated solution mixture is described. The mixing apparatus includes at least one mixing station. The mixing station includes an injector assembly, where the injector assembly includes at least one venturi chamber having at least one suction port in fluid communication with the at least one venturi chamber. The apparatus also includes at least one super concentrate chemical component housed within a chemical container, where the chemical container is fluidly connected by a first tube to the at least one venturi chamber via the at least one suction port, a receiving container fluidly connected to the injector assembly via a second tube, and a fluid source inlet introducing a fluid into the at least one mixing station, where the pressure within the at least one mixing station is less than 150 psi.Type: GrantFiled: March 31, 2015Date of Patent: July 14, 2020Assignee: DuBois Chemicals, Inc.Inventors: Brent McCurdy, Michael Maurizi
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Patent number: 10604895Abstract: Embodiments are directed to methods for inhibiting contaminants formation during papermaking operation. The method includes preparing an aqueous solution having a pH greater than 7.0 and comprising peroxide; and applying the aqueous solution onto or within one or more of forming wires, press felts and woven through air drying (TAD) belts prior to contacting and transporting a wet paper web to inhibit the formation of wet paper web contaminants onto the surfaces of or within the forming wires, press felts and woven TAD belts.Type: GrantFiled: December 5, 2017Date of Patent: March 31, 2020Assignee: DuBois Chemicals, Inc.Inventors: Brandon E. Mahler, Harold Laser
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Patent number: 9856398Abstract: A method of controlling deposits on papermaking surfaces or fabrics on paper machines includes applying a deposition control solution to the papermaking surfaces or fabrics to inhibit deposition of organic contaminants therein. The deposition control solution comprises at least one cationic polymer, at least one at least one phthalate/glycol or polyethylene terephthalate/polyoxyethylene terephthalate (PET:POET) or polyalkylene terephthalate/polyoxyethylene terephthalate (PAT:POET) based copolymer, and at least one non-ionic surfactant in combination to provide improved deposition control.Type: GrantFiled: December 17, 2015Date of Patent: January 2, 2018Assignee: DuBois Chemicals, Inc.Inventors: Harold Laser, Brandon E. Mahler
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Patent number: 9751782Abstract: The present invention relates to systems and methods of wastewater treatment that rely primarily on the use of water treatment chemicals to clean wastewater without the need to use filtration mechanisms. The present invention generally provides a system that is less complex and less expensive to operate than wastewater treatment systems in the prior art.Type: GrantFiled: March 14, 2013Date of Patent: September 5, 2017Assignee: DuBois Chemicals, Inc.Inventor: Brent K. McCurdy
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Patent number: 9512387Abstract: Embodiments of cleaning compositions for removing polymeric soils comprise at least one surfactant, at least one amine, and a solvent blend comprising at least one aromatic alcohol, at least one dibasic ester, and at least one terpene solvent.Type: GrantFiled: December 12, 2011Date of Patent: December 6, 2016Assignee: DUBOIS CHEMICALS, INC.Inventors: Harold Laser, Brandon E. Mahler, Robert E. Ebbeler
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Publication number: 20150148279Abstract: Embodiments of methods of removing polymeric soils from papermaking machine surfaces including developing a solvent blend that is a solubility match for the polymeric soils as defined by a Hansen Solubility factor less than 4 for all polymeric soils, producing an aqueous cleanser comprising the solvent blend, and applying the aqueous cleanser to papermaking surfaces such that the aqueous cleanser solubilizes and removes the polymeric soils from papermaking surfaces. The solvent blend comprises at least one aromatic alcohol, at least one dibasic ester, and at least one terpene solvent.Type: ApplicationFiled: February 4, 2015Publication date: May 28, 2015Applicant: DUBOIS CHEMICALS, INC.Inventors: Harold Laser, Brandon E. Mahler, Robert E. Ebbeler
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Patent number: 9028920Abstract: Embodiments of a method of pretreating a metal substrate prior to painting comprise applying a first coating solution onto the metal substrate wherein the first coating solution comprises polyaniline particles at a pH less than 7 to yield a first coating on the metal substrate, rinsing the metal substrate to remove unreacted polyaniline particles, and applying a second coating solution post-rinse which comprises at least one acid and a silane composition at a pH less than 7 to yield a second coating on the metal substrate.Type: GrantFiled: March 28, 2012Date of Patent: May 12, 2015Assignee: DuBois Chemicals, Inc.Inventors: David Schimpff, Bruce Dunham, William Frisz, Jun O. Zhang
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Publication number: 20140263079Abstract: The present invention relates to systems and methods of wastewater treatment that rely primarily on the use of water treatment chemicals to clean wastewater without the need to use filtration mechanisms. The present invention generally provides a system that is less complex and less expensive to operate than wastewater treatment systems in the prior art.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: DuBois Chemicals, Inc.Inventor: Brent K. McCurdy
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Patent number: 8784679Abstract: Embodiments of a method of producing an aqueous powder composition for treating water comprise mixing sodium metabisulfite powder with amines, wherein the amines comprises liquid cyclohexylamine, and adding water to the mixture of sodium metabisulfite powder and liquid cyclohexylamine to catalyze the production of the aqueous powder composition.Type: GrantFiled: October 25, 2011Date of Patent: July 22, 2014Assignee: Dubois Chemicals, Inc.Inventors: Richard M. Moore, Lyle H. Steimel
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Publication number: 20130260158Abstract: Embodiments of a method of pretreating a metal substrate prior to painting comprise applying a first coating solution onto the metal substrate wherein the first coating solution comprises polyaniline particles at a pH less than 7 to yield a first coating on the metal substrate, rinsing the metal substrate to remove unreacted polyaniline particles, and applying a second coating solution post-rinse which comprises at least one acid and a silane composition at a pH less than 7 to yield a second coating on the metal substrate.Type: ApplicationFiled: March 28, 2012Publication date: October 3, 2013Applicant: DUBOIS CHEMICALS, INC.Inventors: David Schimpff, Bruce Dunham, William Frisz, Jun Q. Zhang
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Publication number: 20130099158Abstract: Embodiments of a method of producing an aqueous powder composition for treating water comprise mixing sodium metabisulfite powder with amines, wherein the amines comprises liquid cyclohexylamine, and adding water to the mixture of sodium metabisulfite powder and liquid cyclohexylamine to catalyze the production of the aqueous powder composition.Type: ApplicationFiled: October 25, 2011Publication date: April 25, 2013Applicant: DUBOIS CHEMICALS, INC.Inventors: Richard Moore, Lyle H. Steimel
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Publication number: 20120204916Abstract: Embodiments of cleaning compositions for removing polymeric soils comprise at least one surfactant, at least one amine, and a solvent blend comprising at least one aromatic alcohol, at least one dibasic ester, and at least one terpene solvent.Type: ApplicationFiled: December 12, 2011Publication date: August 16, 2012Applicant: DUBOIS CHEMICALS, INC.Inventors: Harold Laser, Brandon E. Mahler, Robert E. Ebbeler
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Patent number: 7918968Abstract: An apparatus is described for cleaning papermaking felt by applying a low concentration of a cleaning solution through the oscillating needle nozzles. The detergent is applied intermittently while paper is being manufactured. Each cleaning period lasts for at least the length of time required for the nozzles to cover the entire surface of the felt, and preferably twice that period of time. The application of cleaning solution is then discontinued for a period of time. This cycle is repeated continuously as the paper is being manufactured. The apparatus includes a first cleaning chemical reservoir, a second cleaning chemical reservoir, a high pressure pump coupled to the first and second reservoirs, and a control unit having programming for selectively injecting the chemicals.Type: GrantFiled: November 22, 2010Date of Patent: April 5, 2011Assignee: Dubois Chemicals, Inc.Inventors: Gary Baker, David Kelso
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Patent number: 7850824Abstract: An apparatus is described for cleaning papermaking felt by applying a low concentration of a cleaning solution through the oscillating needle nozzles. The detergent is applied intermittently while paper is being manufactured. Each cleaning period lasts for at least the length of time required for the nozzles to cover the entire surface of the felt, and preferably twice that period of time. The application of cleaning solution is then discontinued for a period of time. This cycle is repeated continuously as the paper is being manufactured. The apparatus includes a first cleaning chemical reservoir, a second cleaning chemical reservoir, a high pressure pump coupled to the first and second reservoirs, and a control unit having programming for selectively injecting the chemicals.Type: GrantFiled: October 2, 2009Date of Patent: December 14, 2010Assignee: Dubois Chemicals, Inc.Inventors: Gary Baker, David Kelso
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Patent number: 7833332Abstract: An aqueous metal treatment composition designed to improve adhesion and corrosion resistance of the metal surface includes an organofunctional silane in combination with a fluorozirconic or fluorotitanic acid, methanesulfonic acid and nitric acid. The methanesulfonic acid acts to reduce sludge formation. Preferably, the composition also includes a fluorosilicic acid which likewise reduces sludge and improves corrosion resistance.Type: GrantFiled: November 3, 2008Date of Patent: November 16, 2010Assignee: Dubois Chemicals, Inc.Inventor: Richard Moore
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Patent number: 7597782Abstract: A method of cleaning papermaking felt by applying a low concentration of a cleaning solution through the oscillating needle nozzles. The detergent is applied intermittently while paper is being manufactured. Each cleaning period lasts for at least the length of time required for the nozzles to cover the entire surface of the felt, and preferably twice that period of time. The application of cleaning solution is then discontinued for a period of time, generally equal to the time the cleaning detergent is applied to the felt. This cycle is repeated continuously as the paper is being manufactured. The chemistry of the cleaning solution can be changed, for example, from acidic to basic, alternately, to enhance cleaning performance.Type: GrantFiled: October 11, 2006Date of Patent: October 6, 2009Assignee: Dubois Chemicals, Inc.Inventors: Gary Baker, David Kelso
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Patent number: 5061392Abstract: A method of forming a paste detergent composition includes forming two separate aqueous solutions. The first aqueous solution includes an effective concentration, generally 1 to 70% of potassium tripolyphosphate. The second solution is an aqueous solution of a water soluble sodium based detergent builder preferably sodium hydroxide. These are combined and due to the effective concentrations of the potassium tripolyphosphate and the water soluble detergent builder, the viscosity of the formed detergent substantially increases relative to either of the viscosities of the first or second aqueous solutions. This provides a unique method of forming paste detergent compositions particularly for use in warewashing machines.Type: GrantFiled: February 7, 1990Date of Patent: October 29, 1991Assignee: DuBois Chemicals, Inc.Inventors: Anthony J. Bruegge, Denny E. Daugherty