Patents by Inventor Joseph Bartel
Joseph Bartel 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: 20100308271Abstract: Semiconductor nanocrystal compositions comprising magnesium containing shells and methods of preparing them are described. The compositions provide strong emission in the blue and green wavelengths as well as chemical and photostability that have not been achieved with conventional shell materials.Type: ApplicationFiled: May 30, 2008Publication date: December 9, 2010Applicant: LIFE TECHNOLOGIES CORPORATIOJNInventor: Joseph Bartel
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Preparation of stable, bright luminescent nanoparticles having compositionally engineered properties
Patent number: 7695642Abstract: A method is provided for preparing luminescent semiconductor nanoparticles composed of a first component X, a second component A, and a third component B, wherein X, A, and B are different, by combining B with X and A in an amount such that the molar ratio B:(A+B) is in the range of approximately 0.001 to 0.20 and the molar ratio X:(A+B) is in the range of approximately 0.5:1.0 to 2:1. The characteristics of the thus-prepared nanoparticles can be substantially similar to those of nanoparticles containing only X and B while maintaining many useful properties characteristic of nanoparticles containing only X and A. The nanoparticles so prepared can additionally exhibit emergent properties such as a peak emission energy less than that characteristic of a particle composed of XA or XB alone; this method is particularly applicable to the preparation of stable, bright nanoparticles that emit in the red to infrared regions of the electromagnetic spectrum.Type: GrantFiled: December 13, 2004Date of Patent: April 13, 2010Assignee: Life Technologies CorporationInventors: Marc D. Schrier, Donald A. Zehnder, Joseph A. Treadway, Joseph A. Bartel -
Preparation of Stable, Bright Luminescent Nanoparticles Having Compositionally Engineered Properties
Publication number: 20100059713Abstract: A method is provided for preparing luminescent semiconductor nanoparticles composed of a first component X, a second component A, and a third component B, wherein X, A, and B are different, by combining B with X and A in an amount such that the molar ratio B:(A+B) is in the range of approximately 0.001 to 0.20 and the molar ratio X:(A+B) is in the range of approximately 0.5:1.0 to 2:1. The characteristics of the thus-prepared nanoparticles can be substantially similar to those of nanoparticles containing only X and B while maintaining many useful properties characteristic of nanoparticles containing only X and A. The nanoparticles so prepared can additionally exhibit emergent properties such as a peak emission energy less than that characteristic of a particle composed of XA or XB alone; this method is particularly applicable to the preparation of stable, bright nanoparticles that emit in the red to infrared regions of the electromagnetic spectrum.Type: ApplicationFiled: June 15, 2009Publication date: March 11, 2010Applicant: LIFE TECHNOLOGIES CORPORATIONInventors: Marc Schrier, Donald A. Zehnder, Joseph A. Treadway, Joseph A. Bartel -
Patent number: 7560505Abstract: A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10° C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.Type: GrantFiled: March 24, 2008Date of Patent: July 14, 2009Assignee: Xerox CorporationInventors: Enno E. Agur, Joseph A. Bartel, Patricia A. Burns, Danielle C. Boils-Boissier, Sheau V. Kao
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Publication number: 20080171283Abstract: A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10° C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.Type: ApplicationFiled: March 24, 2008Publication date: July 17, 2008Applicant: XEROX CORPORATIONInventors: Enno E. Agur, Joseph A. Bartel, Patricia A. Burns, Danielle C. Boils, Sheau V. Kao
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Patent number: 7254930Abstract: A stationary tucker bar mechanism attached to a vertical form, fill, and seal packaging machine used to construct a vertical stand-up pouch and a gusseted flat bottom bag. The invention involves producing a vertical stand-up pouch or flat bottom bag from a single sheet of packaging film by forming one or two vertical creases along opposing sides of the packaging film tube prior to forming a transverse seal on the tube. The vertical crease is formed using the stationary tucker bar gusseting mechanism positioned outside the packaging film tube and positioned between two forming plates located inside the packaging film tube. While the tucker bar gusseting mechanism is stationary during operation, it is fully adjustable along multiple axes of orientation.Type: GrantFiled: November 18, 2005Date of Patent: August 14, 2007Assignee: Frito-Lay North America, Inc.Inventors: Lawrence Joseph Bartel, Anthony Robert Knoerzer, Garrett William Kohl, Steven Kenneth Tucker
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Publication number: 20060154162Abstract: Toner particles comprise resin, wax and optionally colorants, and the wax is substantially excluded from the interior core of the toner particles. Processes for preparing such toner particles comprise providing an aqueous dispersion of resin particles and optionally colorants, mixing the aqueous dispersion in presence of a coagulant, aggregating to form particles, coalescing to form fused particles, and removing the fused particles from the aqueous dispersion. Wax dispersions can be added either after mixing or during aggregation, so that wax is excluded from the core of the toner particles.Type: ApplicationFiled: January 13, 2005Publication date: July 13, 2006Applicant: XEROX CORPORATIONInventors: Ke Zhou, Enno Agur, Wafa Bashir, Maria McDougall, Emily Moore, Shigang Qiu, Vladislav Skorokhod, Daryl Vanbesien, Edward Zwartz, Joseph Bartel, Patricia Burns, T. McAneney, Richard Veregin, Paul Gerroir
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Patent number: 7049042Abstract: A process for the preparation of toner by, for example, mixing a colorant, a latex, and a coagulant comprising cationic wax dispersion to provide, for example, a toner composition of high gloss images.Type: GrantFiled: February 12, 2004Date of Patent: May 23, 2006Assignee: Xerox CorporationInventors: Michael A. Hopper, Raj D. Patel, Enno E. Agur, Joseph Bartel, Daryl Vanbesien
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Patent number: 7041425Abstract: A process including blending a latex emulsion of resin, water, and an ionic surfactant, a colorant dispersion comprised of a colorant, water, and an ionic surfactant; and a wax dispersion comprised of wax, water and an ionic surfactant, heating the resulting mixture in the presence of coagulants, one of which is a source of calcium ions, which heating is below about the glass transition temperature (Tg) of the latex resin and subsequently heating above about the glass transition temperature (Tg) of the latex resin.Type: GrantFiled: February 10, 2004Date of Patent: May 9, 2006Assignee: Xerox CorporationInventors: Michael A. Hopper, Joseph Bartel, Maria N. V. McDougall, Patricia A. Burns, Richard P. N. Veregin
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Publication number: 20050272851Abstract: A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10° C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.Type: ApplicationFiled: June 4, 2004Publication date: December 8, 2005Applicant: XEROX CORPORATIONInventors: Enno Agur, Joseph Bartel, Patricia Burns, Danielle Boils, Sheau Kao
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Preparation of stable, bright luminescent nanoparticles having compositionally engineered properties
Publication number: 20050214536Abstract: A method is provided for preparing luminescent semiconductor nanoparticles composed of a first component X, a second component A, and a third component B, wherein X, A, and B are different, by combining B with X and A in an amount such that the molar ratio B:(A+B) is in the range of approximately 0.001 to 0.20 and the molar ratio X:(A+B) is in the range of approximately 0.5:1.0 to 2:1. The characteristics of the thus-prepared nanoparticles can be substantially similar to those of nanoparticles containing only X and B while maintaining many useful properties characteristic of nanoparticles containing only X and A. The nanoparticles so prepared can additionally exhibit emergent properties such as a peak emission energy less than that characteristic of a particle composed of XA or XB alone; this method is particularly applicable to the preparation of stable, bright nanoparticles that emit in the red to infrared regions of the electromagnetic spectrum.Type: ApplicationFiled: December 13, 2004Publication date: September 29, 2005Applicant: QUANTUM DOT CORPORATIONInventors: Marc Schrier, Donald Zehnder, Joseph Treadway, Joseph Bartel -
Publication number: 20050181294Abstract: A process for the preparation of toner by, for example, mixing a colorant, a latex, and a coagulant comprising cationic wax dispersion to provide, for example, a toner composition of high gloss images.Type: ApplicationFiled: February 12, 2004Publication date: August 18, 2005Inventors: Michael Hopper, Raj Patel, Enno Agur, Joseph Bartel, Daryl Vanbesien
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Publication number: 20050176853Abstract: A process including blending a latex emulsion of resin, water, and an ionic surfactant, a colorant dispersion comprised of a colorant, water, and an ionic surfactant; and a wax dispersion comprised of wax, water and an ionic surfactant, heating the resulting mixture in the presence of coagulants, one of which is a source of calcium ions, which heating is below about the glass transition temperature (Tg) of the latex resin and subsequently heating above about the glass transition temperature (Tg) of the latex resin.Type: ApplicationFiled: February 10, 2004Publication date: August 11, 2005Inventors: Michael Hopper, Joseph Bartel, Maria McDougall, Patricia Burns, Richard Veregin
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Patent number: 6808851Abstract: A process for the preparation of emulsion aggregation toner particles with high pigment loading having a reduced number of wax protrusions on the surface of the toner particles and fewer coarse toner particles. The process includes the introduction of a wax having a molecular weight between about 500 and 2,500, or a blend of waxes having different a molecular weight between 500 and 2,500.Type: GrantFiled: January 15, 2003Date of Patent: October 26, 2004Assignee: Xerox CorporationInventors: Joseph A. Bartel, Patricia A. Burns, Raj D. Patel, Enno E. Agur, Danielle C. Boils, Edward G. Zwartz, Paul J. Gerroir, Maria N. V. McDougall
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Publication number: 20040161174Abstract: A vertical stand-up pouch or flexible package, and method for manufacturing same, constructed by modification to existing vertical form and fill packaging machines. The invention involves producing a vertical stand-up pouch from a single sheet of packaging film by creating a vertical crease along one edge of a packaging film tube prior to forming a transverse seal on the tube. Said vertical crease is formed using a stationary tucker bar positioned outside the packaging film tube and between two forming plates positioned inside the packaging film tube.Type: ApplicationFiled: February 13, 2004Publication date: August 19, 2004Inventors: Lawrence Joseph Bartel, Anthony Robert Knoerzer, Garrett William Kohl, Steven Kenneth Tucker
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Publication number: 20040137357Abstract: A process for the preparation of emulsion aggregation toner particles with high pigment loading having a reduced number of wax protrusions on the surface of the toner particles and fewer coarse toner particles. The process includes the introduction of a wax having a molecular weight between about 500 and 2,500, or a blend of waxes having different a molecular weight between 500 and 2,500.Type: ApplicationFiled: January 15, 2003Publication date: July 15, 2004Inventors: Joseph A. BARTEL, Patricia A. BURNS, Raj D. PATEL, Enno E. AGUR, Danielle C. BOILS, Edward G. ZWARTZ, Paul J. GERROIR, Maria N.V. MCDOUGALL
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Patent number: 6722106Abstract: A vertical stand-up pouch or flexible package, and method for manufacturing same, constructed by modification to existing vertical form and fill packaging machines. The invention involves producing a vertical stand-up pouch from a single sheet of packaging film by creating a vertical crease along one edge of a packaging film tube prior to forming a transverse seal on the tube. Said vertical crease is formed using a stationary tucker bar positioned outside the packaging film tube and between two forming plates positioned inside the packaging film tube.Type: GrantFiled: March 18, 2002Date of Patent: April 20, 2004Assignee: Recot, Inc.Inventors: Lawrence Joseph Bartel, Anthony Robert Knoerzer, Garrett William Kohl, Steven Kenneth Tucker
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Patent number: 6656657Abstract: A toner process comprising mixing an acidified dispersion of an acicular magnetite with an anionic latex, an anionic carbon black dispersion, and an anionic wax dispersion.Type: GrantFiled: March 25, 2002Date of Patent: December 2, 2003Assignee: Xerox CorporationInventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz
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Patent number: 6656658Abstract: A toner process comprising heating an acidified dispersion of an acicular magnetite, a carbon black colorant dispersion, an optional wax dispersion, and an acicular latex.Type: GrantFiled: March 25, 2002Date of Patent: December 2, 2003Assignee: Xerox CorporationInventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz
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Publication number: 20030180647Abstract: A toner process comprising mixing an acidified dispersion of an acicular magnetite with an anionic latex, an anionic carbon black dispersion, and an anionic wax dispersion.Type: ApplicationFiled: March 25, 2002Publication date: September 25, 2003Applicant: Xerox CorporationInventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz