Patents by Inventor Stephen Wolfe
Stephen Wolfe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140243449Abstract: A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. The encapsulation process has at least two additions of encapsulating monomers followed by polymerization. To a pigment dispersed with a polymeric dispersant is added an encapsulating monomer(s) and a polymerization initiator is added which forms a stage 1 encapsulated pigment. Then a second encapsulating monomer(s) is added and these monomers are polymerized by a second addition of polymerization initiator, forming a second stage encapsulated pigment. The second encapsulating monomer(s) may be added continuously to the stage 1 encapsulated pigment. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.Type: ApplicationFiled: December 15, 2011Publication date: August 28, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Hee Hyun Lee, Frank Leonard Schadt, III, Michael Stephen Wolfe
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Patent number: 8815979Abstract: The disclosure provides an aqueous dispersion and ink jet inks comprising a colorant and an amphoteric polyurethane dispersant, wherein the amphoteric polyurethane dispersant comprises a reaction product of at least one basic amine urethane monomer, at least one acidic urethane monomer, and at least one urethane monomer comprising two or more isocyanates having improved bleed control, and optical density/chroma.Type: GrantFiled: December 11, 2009Date of Patent: August 26, 2014Assignee: E I du Pont de Nemours and CompanyInventors: C. Chad Roberts, Patrick F. McIntyre, Michael Stephen Wolfe
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Publication number: 20140155535Abstract: A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. The free polymer dispersant in the pigment dispersion is limited to less than 0.12 grams per gram of pigment. This dispersed pigment is then encapsulated by adding acrylate monomers and optionally acrylic and vinyl monomers and polymerizing. In the encapsulated pigment dispersion the weight ratio of final free polymer to polymer found to the final encapsulated pigment is less than 0.9. The free polymer dispersant is measured by a centrifugation method and the final free polymer is measured by a density gradient centrifugation method. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.Type: ApplicationFiled: December 15, 2011Publication date: June 5, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Hee Hyun Lee, Michael Joseph Otley, Michael Stephen Wolfe, Tristan Williams
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Publication number: 20140094559Abstract: The present disclosure provides an inkjet ink comprising an aqueous vehicle and an encapsulated pigment dispersion. A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. The free polymer dispersant in the pigment dispersion is limited to less than 0.12 grams per gram of pigment. This dispersed pigment is then encapsulated by adding acrylate monomers and optionally acrylic and vinyl monomers and polymerizing. In the encapsulated pigment dispersion the weight ratio of final free polymer to polymer found to the final encapsulated pigment is less than 0.9. The free polymer dispersant is measured by a centrifugation method and the final free polymer is measured by a density gradient centrifugation method. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.Type: ApplicationFiled: December 15, 2011Publication date: April 3, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Hee Hyun Lee, Mihcael Joseph Otley, Michael Stephen Wolfe, Tristan Williams
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Publication number: 20140011941Abstract: A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. An acrylate monomer and a polyurethane dispersion are added and the resultant mixture is polymerized. Optionally, the acrylate monomer/polyurethane mixture may be emulsified in water with an added surfactant or polymeric dispersant and up to 20% acrylic or other vinyl monomers based on the acrylate may be added to the acrylate monomer/polyurethane mixture before polymerization. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.Type: ApplicationFiled: December 15, 2011Publication date: January 9, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Waifong Liew Anton, Hee Hyun Lee, Michael Joseph Otley, Michael Stephen Wolfe
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Publication number: 20130231439Abstract: A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. An acrylate monomer is added and the resultant mixture is polymerized. Optionally, the acrylate monomer may be emulsified in water with an added surfactant or polymeric dispersant and up to 20% acrylic or other vinyl monomers based on the acrylate may be added to acrylate monomer before polymerization. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging Lest conditions, and solvent challenges. Prints from these inks have better durability.Type: ApplicationFiled: December 15, 2011Publication date: September 5, 2013Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Michael Stephen Wolfe, Waifong Liew Anton, Hee Hyun Lee, Charles T. Berge
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Publication number: 20130225754Abstract: Processes for encapsulating pigment dispersions is described and are used in inkjet inks providing stability with regard to heat aging test conditions and solvent challenges. Prints from these inks have better durability than prints made from dispersions that are not encapsulated.Type: ApplicationFiled: December 15, 2011Publication date: August 29, 2013Applicant: E I DuPont De Nemours and CompanyInventors: Michael Stephen Wolfe, Waifong Liew Anton, Hee Hyun Lee
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Publication number: 20130210992Abstract: A process for preparing pigment dispersions is provided in which an organic solvent is used during the milling process in the preparation of pigment dispersions containing a water-soluble polymer as a dispersant.Type: ApplicationFiled: December 15, 2011Publication date: August 15, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Michael Joseph Otley, Michael Stephen Wolfe
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Patent number: 8252148Abstract: A mobile waste processing system and method is disclosed for processing materials in a tank, typically an underground storage tank. A mobile fluid processing module is disposed adjacent to or over the tank, and sealingly connected to the tank through a tank riser. Support equipment, which may include an electric power module, a chiller module, a heating module, and a control and monitor module, are disposed a distance from the processing module, and connected thereto. A pump and optionally a dispersal nozzle are deployed from the processing module into the tank, and effluent is extracted for processing. The processing trailer includes effluent processing equipment such as an evaporator and demister, condenser, vacuum pump, and interim storage tank. The effluent is processed, and at least a portion is removed. Some of the processed effluent may be returned to the tank.Type: GrantFiled: June 15, 2011Date of Patent: August 28, 2012Assignee: Columbia Energy & Environmental Services, Inc.Inventors: Stephen Wolfe, Brian Brendel
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Publication number: 20120127235Abstract: A process for preparing dispersions of particles, especially aqueous dispersions is described. The process relates to a dispersion process where a polar solvent is added during the dispersion process such that the hydrogen bonding solubility parameter component, ?h, of the initial dispersion mixture increases at least 1.5 units. When the polar solvent added is water the dispersion process is called a Solvent-to-Water Process.Type: ApplicationFiled: July 29, 2010Publication date: May 24, 2012Applicant: E.I. DuPont De Nemours and CompanyInventors: Harry Joseph Spinelli, Tristan Williams, Michael Stephen Wolfe, Howard Zakheim
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Publication number: 20120035317Abstract: The present invention relates to urea-terminated polyurethanes dispersants based on diols and polyether diols, aqueous dispersions of such polyurethanes, the manufacture of the urea terminated polyurethane dispersions and inks containing pigments and/or disperse dyes dispersed with these urea terminated polyurethane dispersants. The urea termination can have nonionic hydrophilic substituents.Type: ApplicationFiled: December 4, 2008Publication date: February 9, 2012Inventors: C. Chad Roberts, Patrick F. McIntyre, Michael Stephen Wolfe, Xiaoqing Li, Hari Babu Sunkara
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Publication number: 20110240457Abstract: A mobile waste processing system and method is disclosed for processing materials in a tank, typically an underground storage tank. A mobile fluid processing module is disposed adjacent to or over the tank, and sealingly connected to the tank through a tank riser. Support equipment, which may include an electric power module, a chiller module, a heating module, and a control and monitor module, are disposed a distance from the processing module, and connected thereto. A pump and optionally a dispersal nozzle are deployed from the processing module into the tank, and effluent is extracted for processing. The processing trailer includes effluent processing equipment such as an evaporator and demister, condenser, vacuum pump, and interim storage tank. The effluent is processed, and at least a portion is removed. Some of the processed effluent may be returned to the tank.Type: ApplicationFiled: June 15, 2011Publication date: October 6, 2011Applicant: COLUMBIA ENERGY & ENVIRONMENTAL SERVICES, INC.Inventors: Stephen Wolfe, Brian Brendel
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Publication number: 20110245410Abstract: The disclosure provides an aqueous dispersion and ink jet inks comprising a colorant and an amphoteric polyurethane dispersant, wherein the amphoteric polyurethane dispersant comprises a reaction product of at least one basic amine urethane monomer, at least one acidic urethane monomer, and at least one urethane monomer comprising two or more isocyanates having improved bleed control, and optical density/chroma.Type: ApplicationFiled: December 11, 2009Publication date: October 6, 2011Applicant: E. I. DuPont De Nemours and CompanyInventors: C. Chad Roberts, Patrick F. Mcintyre, Michael Stephen Wolfe
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Publication number: 20110242154Abstract: The present disclosure provides a ink-jet ink, having a pH greater than 7, comprising a first aqueous vehicle, a colorant, more typically a carbon black pigment, and an amphoteric polymeric dispersant, wherein the amphoteric polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment consisting essentially of an amine monomer; and the B block is a segment comprising an acidic monomer and at least one hydrophobic monomer; wherein the dispersant is neutralized, and the B block is free of an amine monomer. The disclosure further pertains to an ink set comprising this ink jet ink and at least a second ink which contains a reactive species with appropriate cationic agent, salt, or pH modifying agent capable of destabilizing the colorant containing dispersion of the first ink.Type: ApplicationFiled: December 12, 2008Publication date: October 6, 2011Applicant: E.I. Du Pont De Nemours and CompanyInventors: C. Chad Roberts, Robert Paul Held, Patrick F. Mcintyre, Michael Stephen Wolfe
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Publication number: 20110205262Abstract: The present invention pertains to process for preparing an aqueous inkjet inks and more particularly to a process for using a milling device with a compatible solvent, a pigment and a polymeric dispersant. While milling a fluid is added to increase the pressure in the mill leading to a dispersion of the pigment with a polymeric dispersant. The polymerically dispersed pigment is then mixed into an aqueous media.Type: ApplicationFiled: November 19, 2009Publication date: August 25, 2011Applicants: E. I. DU PONT DE NEMOURS AND COMPANY, MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Michael Stephen Wolfe, Scott Paap, Jefferson Tester
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Patent number: 7985322Abstract: A mobile waste processing system and method is disclosed for processing materials in a tank, typically an underground storage tank. A mobile fluid processing module is disposed adjacent to or over the tank, and sealingly connected to the tank through a tank riser. Support equipment, which may include an electric power module, a chiller module, a heating module, and a control and monitor module, are disposed a distance from the processing module, and connected thereto. A pump and optionally a dispersal nozzle are deployed from the processing module into the tank, and effluent is extracted for processing. The processing trailer includes effluent processing equipment such as an evaporator and demister, condenser, vacuum pump, and interim storage tank. The effluent is processed, and at least a portion is removed. Some of the processed effluent may be returned to the tank.Type: GrantFiled: July 17, 2007Date of Patent: July 26, 2011Assignee: Columbia Energy & Environmental Services, Inc.Inventors: Stephen Wolfe, Brian Brendel
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Publication number: 20110088591Abstract: The present invention pertains to an inkjet ink set comprising a certain aqueous, pigmented magenta inkjet ink in combination with a certain aqueous, pigmented yellow inkjet ink or a fixer ink. The pigmented magenta ink comprises Pigment Red 146 with defined particle sizes.Type: ApplicationFiled: June 25, 2009Publication date: April 21, 2011Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Michael Stephen Wolfe, Nathaniel Reed Schwartz
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Publication number: 20110039028Abstract: The invention provides an ink for inkjet printing, comprising a self-dispersing pigment colorant and certain urea terminated polyurethanes derived from alpha-omega diols and/or polyetherdiols which enhances print quality especially gloss and distinctness of image without compromising jetting performance.Type: ApplicationFiled: May 22, 2009Publication date: February 17, 2011Applicant: E,I. DU PONT DE NEMOURS AND COMPANYInventors: Harry Joseph Spinelli, C. Chad Roberts, Patrick F. Mcintyre, Michael Stephen Wolfe, Waifong Liew Anton
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Publication number: 20090020232Abstract: A mobile waste processing system and method is disclosed for processing materials in a tank, typically an underground storage tank. A mobile fluid processing module is disposed adjacent to or over the tank, and sealingly connected to the tank through a tank riser. Support equipment, which may include an electric power module, a chiller module, a heating module, and a control and monitor module, are disposed a distance from the processing module, and connected thereto. A pump and optionally a dispersal nozzle are deployed from the processing module into the tank, and effluent is extracted for processing. The processing trailer includes effluent processing equipment such as an evaporator and demister, condenser, vacuum pump, and interim storage tank. The effluent is processed, and at least a portion is removed. Some of the processed effluent may be returned to the tank.Type: ApplicationFiled: July 17, 2007Publication date: January 22, 2009Applicant: COLUMBIA ENERGY & ENVIRONMENTAL SERVICES, INC.Inventors: Stephen Wolfe, Brian Brendel
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Publication number: 20080148949Abstract: A blending jar apparatus is disclosed including a jar structure formed according to the geometric relationship known as Phi. Included is a blade configuration structured according to Phi. The geometric relationship between the jar and the blade configuration creates an implosion (cooling and low friction) effect rather than an explosive (heating and high friction) effect. The blade configuration may be composed of galvanized steel. Two equidistant handles may be secured to the jar by copper rivets protruding into the interior of the cavity. The galvanized steel blades in combination with the copper rivets create a negatively Charged ionic field. A method of electromagnetic field (EMF) shielding technology housed within the motor section of the device is also disclosed.Type: ApplicationFiled: December 21, 2006Publication date: June 26, 2008Inventor: David Stephen Wolfe