Patents by Inventor Gregory J. Shafer
Gregory J. Shafer 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: 11945944Abstract: The disclosure relates to a curable composition comprising: a polymerizable epoxy-acrylate resin composition having a complex viscosity at 25° C. and 1 Hz frequency of at least about 4500 Pa-s and a probe tack peak force of at least about 300 kPa; and abrasive particles partially or fully embedded in the polymerizable epoxy-acrylate resin composition. The disclosure also relates to cured compositions formed from such curable compositions, wherein the abrasive particles are partially or fully embedded in the cured composition. In addition, the disclosure relates to abrasive articles made from such cured compositions as well as methods for making abrasive articles.Type: GrantFiled: December 4, 2017Date of Patent: April 2, 2024Assignee: 3M Innovative Properties CompanyInventors: Kathleen S. Shafer, Rebecca A. Putans, Ernest L. Thurber, Cyrus A. Anderson, Corinne E. Lipscomb, Thomas J. Nelson, Gregory P. Sorenson, Chainika Jangu
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Patent number: 10472491Abstract: VDF-co-(TFE or TrFE) polymers having a molecular weight of at least about 1,000,000 g/mol and a melt temperature less than about 240° C. The VDF copolymer contains at least about 50 mol % VDF monomer and may include an amount of at least one other monomer. The VDF copolymer may be used to form a membrane that has a node and fibril structure. The membrane has a percent porosity of at least 25%. A VDF-co-(TFE or TrFE) polymer membrane may be formed by lubricating the VDF copolymer, subjecting the lubricated polymer to pressure at a temperature below the melting point of the VDF copolymer to form a preform material, and expanding the preform material at a temperature below the melting temperature of the VDF copolymer. Dense VDF copolymer articles, filled VDF copolymer membranes, and VDF copolymer fibers are also provided.Type: GrantFiled: August 18, 2017Date of Patent: November 12, 2019Assignee: W. L. Gore & Associates, Inc.Inventors: Guy A. Sbriglia, Gregory J. Shafer
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Patent number: 10266670Abstract: VDF-co-(TFE or TrFE) polymers having a molecular weight of at least about 1,000,000 g/mol and a melt temperature less than about 240° C. The VDF copolymer contains at least about 50 mol % VDF monomer and may include an amount of at least one other monomer. The VDF copolymer may be used to form a membrane that has a node and fibril structure. The membrane has a percent porosity of at least 25%. A VDF-co-(TFE or TrFE) polymer membrane may be formed by lubricating the VDF copolymer, subjecting the lubricated polymer to pressure at a temperature below the melting point of the VDF copolymer to form a preform material, and expanding the preform material at a temperature below the melting temperature of the VDF copolymer. Dense VDF copolymer articles, filled VDF copolymer membranes, and VDF copolymer fibers are also provided.Type: GrantFiled: November 24, 2015Date of Patent: April 23, 2019Assignee: W. L. Gore & Associates, Inc.Inventors: Guy A. Sbriglia, Gregory J. Shafer
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Publication number: 20180171195Abstract: The invention pertains to heat transfer compositions, particularly to automobile refrigerants comprising a hydrofluoroalkene, an iodocarbon, and at least one lubricant having hydrogen atoms and carbon atoms, wherein no more than 17% of the total number of hydrogen atoms which are attached to a carbon atom are tertiary hydrogen atoms.Type: ApplicationFiled: February 14, 2018Publication date: June 21, 2018Inventors: Raymond H. Thomas, Rajiv R. Singh, George J. Samuels, Ian Shankland, David P. Wilson, Roy P. Robinson, Michael Van Der Puy, John L. Welch, Gregory J. Shafer, Mark W. Spatz, Ryan Hulse
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Patent number: 9988506Abstract: A tetrafluoroethylene (TFE) copolymer film having a first endotherm between about 50° C. and about 300° C., a second endotherm between about 320° C. and about 350° C., and a third endotherm between about 350° C. and about 400° C. is provided. In exemplary embodiments, the third endotherm is approximately 380° C. In some embodiments, the second endotherm is between about 320° C. and about 330° C. or between about 330° C. and about 350° C. TFE copolymer films have a methane permeability less than about 20 ?g*micron/cm2/min. In addition, the dense articles have a void volume of less than about 20%. Methods for dense articles from core shell tetrafluoroethylene copolymers are also provided. The dense articles exhibit improved physical and mechanical properties such as adhesion and barrier properties.Type: GrantFiled: April 4, 2017Date of Patent: June 5, 2018Assignees: W. L. Gore & Associates, Inc., W. L. Gore & Associates GmbHInventors: Lawrence A. Ford, Michael E. Kennedy, Shaofeng Ran, Todd S. Sayler, Gregory J. Shafer
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Patent number: 9920230Abstract: The invention pertains to heat transfer compositions, particularly to automobile refrigerants comprising a hydrofluoroalkene, an iodocarbon, and at least one lubricant having hydrogen atoms and carbon atoms, wherein no more than 17% of the total number of hydrogen atoms which are attached to a carbon atom are tertiary hydrogen atoms.Type: GrantFiled: February 8, 2011Date of Patent: March 20, 2018Assignee: HONEYWELL INTERNATIONAL INC.Inventors: Raymond H. Thomas, Rajiv R. Singh, George J. Samuels, Ian Shankland, David P. Wilson, Roy P. Robinson, Michael Van Der Puy, John L. Welch, Gregory J. Shafer, Mark W. Spatz, Ryan Hulse
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Publication number: 20170349724Abstract: VDF-co-(TFE or TrFE) polymers having a molecular weight of at least about 1,000,000 g/mol and a melt temperature less than about 240° C. The VDF copolymer contains at least about 50 mol % VDF monomer and may include an amount of at least one other monomer. The VDF copolymer may be used to form a membrane that has a node and fibril structure. The membrane has a percent porosity of at least 25%. A VDF-co-(TFE or TrFE) polymer membrane may be formed by lubricating the VDF copolymer, subjecting the lubricated polymer to pressure at a temperature below the melting point of the VDF copolymer to form a preform material, and expanding the preform material at a temperature below the melting temperature of the VDF copolymer. Dense VDF copolymer articles, filled VDF copolymer membranes, and VDF copolymer fibers are also provided.Type: ApplicationFiled: August 18, 2017Publication date: December 7, 2017Inventors: Guy A. Sbriglia, Gregory J. Shafer
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Publication number: 20170306070Abstract: A process for the preparation of a fluoroolefin polymer from an azeotropic mixture of monomers having a constant composition, the process including the step of: contacting in a reaction zone: (i) an initiator; and (ii) an azeotropic mixture of monomers including at least one fluoroolefin and, optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith; wherein the contacting is carried out at a temperature, pressure and length of time sufficient to produce the fluoroolefin polymer.Type: ApplicationFiled: July 13, 2017Publication date: October 26, 2017Inventors: George J. Samuels, Gregory J. Shafer, Hang T. Pham
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Publication number: 20170210865Abstract: A tetrafluoroethylene (TFE) copolymer film having a first endotherm between about 50° C. and about 300° C., a second endotherm between about 320° C. and about 350° C., and a third endotherm between about 350° C. and about 400° C. is provided. In exemplary embodiments, the third endotherm is approximately 380° C. In some embodiments, the second endotherm is between about 320° C. and about 330° C. or between about 330° C. and about 350° C. TFE copolymer films have a methane permeability less than about 20 ?g*micron/cm2/min. In addition, the dense articles have a void volume of less than about 20%. Methods for dense articles from core shell tetrafluoroethylene copolymers are also provided. The dense articles exhibit improved physical and mechanical properties such as adhesion and barrier properties.Type: ApplicationFiled: April 4, 2017Publication date: July 27, 2017Inventors: Lawrence A. Ford, Michael E. Kennedy, Shaofeng Ran, Todd S. Sayler, Gregory J. Shafer
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Patent number: 9650479Abstract: A tetrafluoroethylene (TFE) copolymer film having a first endotherm between about 50° C. and about 300° C., a second endotherm between about 320° C. and about 350° C., and a third endotherm between about 350° C. and about 400° C. is provided. In exemplary embodiments, the third endotherm is approximately 380° C. In some embodiments, the second endotherm is between about 320° C. and about 330° C. or between about 330° C. and about 350° C. TFE copolymer films have a methane permeability less than about 20 ?g*micron/cm2/min. In addition, the dense articles have a void volume of less than about 20%. Methods for dense articles from core shell tetrafluoroethylene copolymers are also provided. The dense articles exhibit improved physical and mechanical properties such as adhesion and barrier properties.Type: GrantFiled: December 19, 2014Date of Patent: May 16, 2017Assignees: W. L. Gore & Associates, Inc., W. L. Gore & Associates GmbHInventors: Lawrence A. Ford, Michael E. Kennedy, Shaofeng Ran, Todd S. Sayler, Gregory J. Shafer
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Patent number: 9644054Abstract: A dense article that includes a dense TFE copolymer film is provided. The dense TFE copolymer film includes a first endotherm between about 50° C. and about 300° C., a second endotherm between about 320° C. and about 350° C., and a third endotherm between about 350° C. and about 400° C. To form the dense article, a core shell TFE copolymer is formed into a pellet, ram extruded into a tape, dried into a dried preform, and then stretched into a dense TFE copolymer film that exhibits improved physical and mechanical properties. The dense TFE copolymer film is produced directly from the dried preform at a deformation temperature less than about 335° C. and without increasing the porosity of the dried preform, as would conventionally be done in expansion processes. The dense TFE copolymer films have a methane permeability less than about 20 ?g*micron/cm2/min. The dense articles have a void volume less than about 20%.Type: GrantFiled: December 19, 2014Date of Patent: May 9, 2017Assignees: W. L. Gore & Associates, Inc., W. L. Gore & Associates GmbHInventors: Lawrence A. Ford, Michael E. Kennedy, Shaofeng Ran, Todd S. Sayler, Gregory J. Shafer
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Patent number: 9441088Abstract: VDF-co-(TFE or TrFE) polymers having a molecular weight of at least about 1,000,000 g/mol and a melt temperature less than about 240° C. The VDF copolymer contains at least about 50 mol % VDF monomer and may include an amount of at least one other monomer. The VDF copolymer may be used to form a membrane that has a node and fibril structure. The membrane has a percent porosity of at least 25%. A VDF-co-(TFE or TrFE) polymer membrane may be formed by lubricating the VDF copolymer, subjecting the lubricated polymer to pressure at a temperature below the melting point of the VDF copolymer to form a preform material, and expanding the preform material at a temperature below the melting temperature of the VDF copolymer. Dense VDF copolymer articles, filled VDF copolymer membranes, and VDF copolymer fibers are also provided.Type: GrantFiled: July 28, 2015Date of Patent: September 13, 2016Assignee: W. L. Gore & Associates, Inc.Inventors: Guy A. Sbriglia, Gregory J. Shafer
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Publication number: 20160177001Abstract: A dense article that includes a dense TFE copolymer film is provided. The dense TFE copolymer film includes a first endotherm between about 50° C. and about 300° C., a second endotherm between about 320° C. and about 350° C., and a third endotherm between about 350° C. and about 400° C. To form the dense article, a core shell TFE copolymer is formed into a pellet, ram extruded into a tape, dried into a dried preform, and then stretched into a dense TFE copolymer film that exhibits improved physical and mechanical properties. The dense TFE copolymer film is produced directly from the dried preform at a deformation temperature less than about 335° C. and without increasing the porosity of the dried preform, as would conventionally be done in expansion processes. The dense TFE copolymer films have a methane permeability less than about 20 ?g*micron/cm2/min. The dense articles have a void volume less than about 20%.Type: ApplicationFiled: December 19, 2014Publication date: June 23, 2016Inventors: Lawrence A. Ford, Michael E. Kennedy, Shaofeng Ran, Todd S. Sayler, Gregory J. Shafer
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Publication number: 20160075854Abstract: VDF-co-(TFE or TrFE) polymers having a molecular weight of at least about 1,000,000 g/mol and a melt temperature less than about 240° C. The VDF copolymer contains at least about 50 mol % VDF monomer and may include an amount of at least one other monomer. The VDF copolymer may be used to form a membrane that has a node and fibril structure. The membrane has a percent porosity of at least 25%. A VDF-co-(TFE or TrFE) polymer membrane may be formed by lubricating the VDF copolymer, subjecting the lubricated polymer to pressure at a temperature below the melting point of the VDF copolymer to form a preform material, and expanding the preform material at a temperature below the melting temperature of the VDF copolymer. Dense VDF copolymer articles, filled VDF copolymer membranes, and VDF copolymer fibers are also provided.Type: ApplicationFiled: November 24, 2015Publication date: March 17, 2016Inventors: Guy A. Sbriglia, Gregory J. Shafer
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Publication number: 20160032071Abstract: VDF-co-(TFE or TrFE) polymers having a molecular weight of at least about 1,000,000 g/mol and a melt temperature less than about 240° C. The VDF copolymer contains at least about 50 mol % VDF monomer and may include an amount of at least one other monomer. The VDF copolymer may be used to form a membrane that has a node and fibril structure. The membrane has a percent porosity of at least 25%. A VDF-co-(TFE or TrFE) polymer membrane may be formed by lubricating the VDF copolymer, subjecting the lubricated polymer to pressure at a temperature below the melting point of the VDF copolymer to form a preform material, and expanding the preform material at a temperature below the melting temperature of the VDF copolymer. Dense VDF copolymer articles, filled VDF copolymer membranes, and VDF copolymer fibers are also provided.Type: ApplicationFiled: July 28, 2015Publication date: February 4, 2016Inventors: Guy A. Sbriglia, Gregory J. Shafer
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Publication number: 20150111031Abstract: A tetrafluoroethylene (TFE) copolymer film having a first endotherm between about 50° C. and about 300° C., a second endotherm between about 320° C. and about 350° C., and a third endotherm between about 350° C. and about 400° C. is provided. In exemplary embodiments, the third endotherm is approximately 380° C. In some embodiments, the second endotherm is between about 320° C. and about 330° C. or between about 330° C. and about 350° C. TFE copolymer films have a methane permeability less than about 20 ?g*micron/cm2/min. In addition, the dense articles have a void volume of less than about 20%. Methods for dense articles from core shell tetrafluoroethylene copolymers are also provided. The dense articles exhibit improved physical and mechanical properties such as adhesion and barrier properties.Type: ApplicationFiled: December 19, 2014Publication date: April 23, 2015Inventors: Lawrence A. Ford, Michael E. Kennedy, Shaofeng Ran, Todd S. Sayler, Gregory J. Shafer
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Publication number: 20140005335Abstract: A process for the preparation of a fluoroolefin polymer from an azeotropic mixture of monomers having a constant composition, the process including the step of: contacting in a reaction zone: (i) an initiator; and (ii) an azeotropic mixture of monomers including at least one fluoroolefin and, optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith; wherein the contacting is carried out at a temperature, pressure and length of time sufficient to produce the fluoroolefin polymer.Type: ApplicationFiled: September 5, 2013Publication date: January 2, 2014Applicant: Honeywell International Inc.Inventors: George J. Samuels, Gregory J. Shafer, Hang T. Pham
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Patent number: 8552128Abstract: A process for the preparation of a fluoroolefin polymer from an azeotropic mixture of monomers having a constant composition, the process including the step of: contacting in a reaction zone: (i) an initiator; and (ii) an azeotropic mixture of monomers including at least one fluoroolefin and, optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith; wherein the contacting is carried out at a temperature, pressure and length of time sufficient to produce the fluoroolefin polymer.Type: GrantFiled: December 20, 2007Date of Patent: October 8, 2013Assignee: Honeywell International Inc.Inventors: George J Samuels, Gregory J Shafer, Hang T Pham
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Publication number: 20120184697Abstract: A polyvinylidene difluoride copolymer with a fluoroolefin selected from 2,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2-chloro-pentafluoropropene, hexafluoropropylene, trifluoroethylene, chlorotrifluoroethylene, 3,3,3-trifluoro-2-trifluoromethylpropene and a mixture thereof, wherein the stoichiometry of the co-monomers defines the barrier properties of the copolymer. Such polymers include moisture barrier copolymers and oxygen barrier copolymer. Processes for preparing such moisture barrier copolymers and oxygen barrier copolymers are also provided.Type: ApplicationFiled: March 20, 2012Publication date: July 19, 2012Applicant: HONEYWELL INTERNATIONAL INC.Inventors: GEORGE J. SAMUELS, GREGORY J. SHAFER, TAO LI, CLINTON A. THRELFALL, NANCY IWAMOTO, ERIC J. RAINAL
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Patent number: 8163858Abstract: A polyvinylidene difluoride copolymer with a fluoroolefin selected from 2,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2-chloro-pentafluoropropene, hexafluoropropylene, trifluoroethylene, chlorotrifluoroethylene, 3,3,3-trifluoro-2-trifluoromethylpropene and a mixture thereof, wherein the stoichiometry of the co-monomers defines the barrier properties of the copolymer. Such polymers include moisture barrier copolymers and oxygen barrier copolymer. Processes for preparing such moisture barrier copolymers and oxygen barrier copolymers are also provided.Type: GrantFiled: December 20, 2007Date of Patent: April 24, 2012Assignee: Honeywell International Inc.Inventors: George J Samuels, Gregory J Shafer, Tao Li, Clinton A Threlfall, Nancy Iwamoto, Eric J Rainal