Patents by Inventor Michael S. Hawkins
Michael S. Hawkins 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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Patent number: 9395637Abstract: Incorporation of organic amines as neutralization agents in based phase inversion emulsification (PIE) processes to provide emulsification of high molecular amorphous and high molecular branch amorphous polyester resins, which are traditionally difficult to emulsify. The organic amines facilitate emulsification of these resins to achieve desired particle size with a narrow size distribution.Type: GrantFiled: January 20, 2016Date of Patent: July 19, 2016Assignee: XEROX CORPORATIONInventors: Yulin Wang, Shigang Steven Qiu, Ke Zhou, Karen A. Moffat, Edward G. Zwartz, Michael S. Hawkins, Paul J. Gerroir
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Patent number: 9377713Abstract: A custom color toner production system includes a toner delivery system, a cartridge sealing system, a mixing system, and a packaging system. The toner delivery system includes selectively engageable fluid delivery lines for delivering toner of particular color to a cartridge as need for producing a custom color toner in response to an electronically submitted user request. Cartridge containing the unmixed delivered toner may be sealed by a sealing system, and blended using a resonant mixer to produce a custom color toner. The cartridge containing the mixed custom color toner may be packaged using a packaging system.Type: GrantFiled: March 30, 2012Date of Patent: June 28, 2016Assignee: Xerox CorporationInventors: Santiago Faucher, Gerhard Pawelka, Majid Kasmaei Kamel, Michael S. Hawkins, Suxia Yang, Richard P. N. Veregin, Joseph Barbisan
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Publication number: 20160147165Abstract: Incorporation of organic amines as neutralization agents in based phase inversion emulsification (PIE) processes to provide emulsification of high molecular amorphous and high molecular branch amorphous polyester resins, which are traditionally difficult to emulsify. The organic amines facilitate emulsification of these resins to achieve desired particle size with a narrow size distribution.Type: ApplicationFiled: January 20, 2016Publication date: May 26, 2016Inventors: Yulin Wang, Shigang Steven Qiu, Ke Zhou, Karen A. Moffat, Edward G. Zwartz, Michael S. Hawkins, Paul J. Gerroir
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Patent number: 9329510Abstract: The disclosure describes a one reaction process for making a bio-based polyester resin. The resultant polyester resin retains thermal properties as compared to a similar resin but made using previous multi-step processes conducted in separate vessels.Type: GrantFiled: August 22, 2013Date of Patent: May 3, 2016Assignee: Xerox CorporationInventors: Guerino G Sacripante, Ke Zhou, Edward G Zwartz, Michael S Hawkins, Veronique Laberge, Alan EJ Toth, Rashid Mahmood, Mark R Elliott, John Abate
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Patent number: 9285699Abstract: Disclosed is a carrier suitable for use with an electrophotographic developer and an electrophotographic developer containing the carrier. In particular, the carrier is powder coated and comprises a copolymer of cyclohexylmethacrylate and dimethylaminoethylmethacrylate.Type: GrantFiled: May 1, 2014Date of Patent: March 15, 2016Assignee: XEROX CORPORATIONInventors: Bernard A. Kelly, Thomas C. Dombroski, Brian S. Giannetto, Brian E. Moore, Lloyd D. Spencer, Richard P. N. Veregin, Karen A. Moffat, Thomas E. Enright, Valerie M. Farrugia, Michael S. Hawkins, Wafa F. Bashir
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Patent number: 9195158Abstract: The instant disclosure describes methacrylate coated carrier resins with aromatic substituent groups with optionally carbon atoms replaced by heteroatoms such as S, N, and O for charge control and improved RH sensitivity.Type: GrantFiled: June 14, 2013Date of Patent: November 24, 2015Assignees: Xerox Corporation, NRC of CanadaInventors: Richard P N Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W Vanbesien, Michael S Hawkins
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Patent number: 9188891Abstract: A toner includes a polymeric resin, optionally a colorant, and a small molecule crystalline aromatic ether having a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline aromatic ether may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a melting point for the crystalline aromatic ether as determined by differential scanning calorimetry, the enthalpy of fusion for the crystalline aromatic ether in the mixture being measured to be less than 10% of the enthalpy of fusion of the crystalline aromatic ether in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner. Suitable crystalline aromatic ethers may include benzyl 2-naphthyl ether.Type: GrantFiled: November 11, 2013Date of Patent: November 17, 2015Assignee: XEROX CORPORATIONInventors: Ke Zhou, Jordan H. Wosnick, Kentaro Morimitsu, Michael S. Hawkins, Edward G. Zwartz, Valerie M. Farrugia
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Patent number: 9188895Abstract: Toner additives for improving overall toner charging. In particular, incorporation of fluorinated surfactants into latex for formation of toner core particles provide enhanced charging without any significant adverse impact on the other properties of the toner. Methods of making toners comprising the fluorinated surfactants are also provided.Type: GrantFiled: December 16, 2013Date of Patent: November 17, 2015Assignee: XEROX CORPORATIONInventors: Valerie M. Farrugia, Kimberly D. Nosella, Richard P. N. Veregin, Michael S. Hawkins
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Publication number: 20150316866Abstract: Disclosed is a carrier suitable for use with an electrophotographic developer and an electrophotographic developer containing the carrier. In particular, the carrier is powder coated and comprises a copolymer of cyclohexylmethacrylate and dimethylaminoethylmethacrylate.Type: ApplicationFiled: May 1, 2014Publication date: November 5, 2015Applicant: XEROX CORPORATIONInventors: Bernard A. Kelly, Thomas C. Dombroski, Brian S. Giannetto, Brian E. Moore, Lloyd D. Spencer, Richard P.N. Veregin, Karen A. Moffat, Thomas E. Enright, Valerie M. Farrugia, Michael S. Hawkins, Wafa F. Bashir
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Patent number: 9069275Abstract: The disclosure generally describes carrier resins, and in particular, resins used for carrier coatings which include at least one ester functional group and at least one cyclic aliphatic group containing at least one nitrogen atom in the cyclic ring structure. Carriers having such resins in the coating exhibit high charge and excellent relative humidity (RH) sensitivity of charge to changing environmental conditions.Type: GrantFiled: April 3, 2013Date of Patent: June 30, 2015Assignees: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADAInventors: Richard P. Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Darren Makeiff, Valerie Farrugia, Michael S. Hawkins
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Publication number: 20150168861Abstract: Toner additives for improving overall toner charging. In particular, incorporation of fluorinated surfactants into latex for formation of toner core particles provide enhanced charging without any significant adverse impact on the other properties of the toner. Methods of making toners comprising the fluorinated surfactants are also provided.Type: ApplicationFiled: December 16, 2013Publication date: June 18, 2015Applicant: XEROX CORPORATIONInventors: Valerie M. Farrugia, Kimberly D. Nosella, Richard P.N. Veregin, Michael S. Hawkins
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Publication number: 20150168860Abstract: Toner additives for improving overall toner charging. In particular, incorporation of fluorinated surfactants into latex for formation of toner core particles provide enhanced charging without any significant adverse impact on the other properties of the toner. Methods of making toners comprising the fluorinated surfactants are also provided.Type: ApplicationFiled: December 16, 2013Publication date: June 18, 2015Applicant: XEROX CORPORATIONInventors: Valerie M. Farrugia, Kimberly D. Nosella, Richard P.N. Veregin, Michael S. Hawkins
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Patent number: 9046801Abstract: Emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies. Namely, there is provided an emulsion aggregation toner that comprises a base resin composed of both styrene-acrylate and polyester resins. Such hybrid emulsion aggregation toner compositions are lower in cost but still maintain desirable developer properties like low minimum fusing temperature (MFT) and lower dielectric loss.Type: GrantFiled: October 29, 2013Date of Patent: June 2, 2015Assignee: XEROX CORPORATIONInventors: Kimberly D. Nosella, Guerino G. Sacripante, Edward G. Zwartz, Richard P. N. Veregin, Michael S. Hawkins, David J. W. Lawton
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Patent number: 9034546Abstract: A toner includes a polymeric resin, optionally a colorant, and a small molecule crystalline imide having a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline imide may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a melting point for the crystalline imide as determined by differential scanning calorimetry, the enthalpy of fusion for the crystalline imide in the mixture being measured to be less than 10% of the enthalpy of fusion of the crystalline imide in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner. Suitable crystalline imides may include N-alkyl and N-aryl imides, such as N-benzylphthalimide.Type: GrantFiled: November 11, 2013Date of Patent: May 19, 2015Assignee: XEROX CORPOARATIONInventors: Jordan H. Wosnick, Ke Zhou, Kentaro Morimitsu, Michael S. Hawkins, Edward G. Zwartz, Valerie M. Farrugia
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Publication number: 20150132692Abstract: A toner includes a polymeric resin, optionally a colorant, and a small molecule crystalline imide having a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline imide may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a melting point for the crystalline imide as determined by differential scanning calorimetry, the enthalpy of fusion for the crystalline imide in the mixture being measured to be less than 10% of the enthalpy of fusion of the crystalline imide in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner. Suitable crystalline imides may include N-alkyl and N-aryl imides, such as N-benzylphthalimide.Type: ApplicationFiled: November 11, 2013Publication date: May 14, 2015Applicant: XEROX CORPORATIONInventors: JORDAN H. WOSNICK, Ke Zhou, Kentaro Morimitsu, Michael S. Hawkins, Edward G. Zwartz, Valerie M. Farrugia
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Publication number: 20150132691Abstract: A toner includes a polymeric resin, optionally a colorant, and a small molecule crystalline aromatic ether having a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline aromatic ether may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a melting point for the crystalline aromatic ether as determined by differential scanning calorimetry, the enthalpy of fusion for the crystalline aromatic ether in the mixture being measured to be less than 10% of the enthalpy of fusion of the crystalline aromatic ether in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner. Suitable crystalline aromatic ethers may include benzyl 2-naphthyl ether.Type: ApplicationFiled: November 11, 2013Publication date: May 14, 2015Applicant: XEROX CORPORATIONInventors: KE ZHOU, Jordan H. Wosnick, Kentaro Morimitsu, Michael S. Hawkins, Edward G. Zwartz, Valerie M. Farrugia
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Publication number: 20150118613Abstract: Emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies. Namely, there is provided an emulsion aggregation toner that comprises a base resin composed of both styrene-acrylate and polyester resins. Such hybrid emulsion aggregation toner compositions are lower in cost but still maintain desirable developer properties like low minimum fusing temperature (MFT) and lower dielectric loss.Type: ApplicationFiled: October 29, 2013Publication date: April 30, 2015Applicant: XEROX CORPORATIONInventors: KIMBERLY D. NOSELLA, Guerino G. Sacripante, Edward G. Zwartz, Richard P.N. Veregin, Michael S. Hawkins, David J.W. Lawton
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Patent number: 9012118Abstract: Toners are provided which possess excellent blocking characteristics. The toners include cores including amorphous resins having low glass transition temperatures, amorphous resins having high glass transition temperatures, and crystalline resins, and shells including amorphous resins having high glass transition temperatures.Type: GrantFiled: March 4, 2010Date of Patent: April 21, 2015Assignee: Xerox CorporationInventors: Allan K. Chen, Tie Hwee Ng, Edward Graham Zwartz, Michael S. Hawkins
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Publication number: 20150056550Abstract: The disclosure describes a one reaction process for making a bio-based polyester resin. The resultant polyester resin retains thermal properties as compared to a similar resin but made using previous multi-step processes conducted in separate vessels.Type: ApplicationFiled: August 22, 2013Publication date: February 26, 2015Applicant: Xerox CorporationInventors: Guerino G. Sacripante, Ke Zhou, Edward G. Zwartz, Michael S. Hawkins, Veronique Laberge, Alan EJ Toth, Rashid Mahmood, Mark R. Elliott, John Abate
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Publication number: 20150010336Abstract: The present disclosure provides for enzymatic polymerization to produce polyester resins suitable for use in manufacturing toners. In embodiments, crystalline copolymers, which are polyesters, may be synthesized from lactones, cyclic anhydrides, cyclic carbonates, and combinations thereof. These crystalline copolymers, in turn, may be utilized in the synthesis of toner particles.Type: ApplicationFiled: September 20, 2014Publication date: January 8, 2015Inventors: Jordan H Wosnick, Santiago Faucher, Edward G Zwartz, Michael S Hawkins, Karen A Moffat