Patents by Inventor Thomas Y Tam
Thomas Y Tam 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: 20180023218Abstract: An improved process for solution spinning of ultra-high molecular weight polyethylene (UHMW PE) filaments, wherein the 10 wt % solution of the UHMW PE in mineral oil at 250° C. has a Cogswell extensional viscosity and a shear viscosity within select ranges.Type: ApplicationFiled: November 10, 2014Publication date: January 25, 2018Applicant: HONEYWELL INTERNATIONAL INC.Inventors: THOMAS Y. TAM, JOHN A. YOUNG, QIANG ZHOU, CONOR J. TWOMEY, CHARLES R. ARNETT
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Patent number: 9556537Abstract: Multi-filament UHMW PE yarns can be produced according to processes that result in improved properties. The UHMW PE can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun yarn having a tenacity of greater than about 45 g/d (40.5 g/dtex).Type: GrantFiled: June 3, 2014Date of Patent: January 31, 2017Assignee: HONEYWELL INTERNATIONAL INC.Inventors: Thomas Y. Tam, John A. Young, Norman Aminuddin, John E. Hermes
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Patent number: 9365953Abstract: Multi-filament ultra high molecular weight polyethylene fibers can be produced according to processes that result in improved properties. The ultra high molecular weight polyethylene can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun fiber having a tenacity of greater than about 45 g/denier (40.5 g/dtex).Type: GrantFiled: June 30, 2011Date of Patent: June 14, 2016Assignee: HONEYWELL INTERNATIONAL INC.Inventors: Thomas Y. Tam, John A. Young, Norman Aminuddin, John E. Hermes
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Publication number: 20160160391Abstract: An improved process for solution spinning of ultra-high molecular weight polyethylene (UHMW PE) filaments, wherein the 10 wt % solution of the UHMW PE in mineral oil at 250° C. has a Cogswell extensional viscosity and a shear viscosity within select ranges.Type: ApplicationFiled: November 10, 2014Publication date: June 9, 2016Applicant: HONEYWELL INTERNATIONAL INC.Inventors: THOMAS Y. TAM, JOHN A. YOUNG, QIANG ZHOU, CONOR J. TWOMEY, CHARLES R. ARNETT
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Patent number: 8889049Abstract: An improved process for solution spinning of ultra-high molecular weight polyethylene (UHMW PE) filaments, wherein the 10 wt % solution of the UHMW PE in mineral oil at 250° C. has a Cogswell extensional viscosity and a shear viscosity within select ranges.Type: GrantFiled: April 30, 2010Date of Patent: November 18, 2014Assignee: Honeywell International IncInventors: Thomas Y. Tam, John A. Young, Qiang Zhou, Conor J. Twomey, Charles Arnett
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Publication number: 20140283674Abstract: Multi-filament UHMW PE yarns can be produced according to processes that result in improved properties. The UHMW PE can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun yarn having a tenacity of greater than about 45 g/d (40.5 g/dtex).Type: ApplicationFiled: June 3, 2014Publication date: September 25, 2014Applicant: HONEYWELL INTERNATIONAL INC.Inventors: THOMAS Y. TAM, JOHN A. YOUNG, NORMAN AMINUDDIN, JOHN E. HERMES
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Patent number: 8747715Abstract: Multi-filament UHMW PE yarns can be produced according to processes that result in improved properties. The UHMW PE can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun yarn having a tenacity of greater than about 45 g/d (40.5 g/dtex).Type: GrantFiled: April 30, 2010Date of Patent: June 10, 2014Assignee: Honeywell International IncInventors: Thomas Y. Tam, John A. Young, Norman Aminuddin, John E. Hermes
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Publication number: 20140103568Abstract: Multi-filament UHMW PE yarns can be produced according to processes that result in improved properties. The UHMW PE can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun yarn having a tenacity of greater than about 45 g/d (40.5 g/dtex).Type: ApplicationFiled: April 30, 2010Publication date: April 17, 2014Applicant: Honeywell International Inc.Inventors: THOMAS Y. TAM, John A. Young, Norman Aminuddin, John E. Hermes
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Publication number: 20110266710Abstract: Multi-filament UHMW PE yarns can be produced according to processes that result in improved properties. The UHMW PE can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun yarn having a tenacity of greater than about 45 g/d (40.5 g/dtex).Type: ApplicationFiled: April 30, 2010Publication date: November 3, 2011Applicant: Honeywell International Inc.Inventors: THOMAS Y. TAM, John A. Young, Norman Aminuddin, John E. Hermes
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Publication number: 20110268967Abstract: An improved process for solution spinning of ultra-high molecular weight polyethylene (UHMW PE) filaments, wherein the 10 wt % solution of the UHMW PE in mineral oil at 250° C. has a Cogswell extensional viscosity and a shear viscosity within select ranges.Type: ApplicationFiled: April 30, 2010Publication date: November 3, 2011Applicant: Honeywell International Inc.Inventors: Thomas Y. Tam, John A. Young, Qiang Zhou, Conor J. Twomey, Charles R. Arnett
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Publication number: 20110269359Abstract: Multi-filament UHMW PE fibers can be produced according to processes that result in improved properties. The UHMW PE can have an intrinsic viscosity in decalin at 135° C. of at least about 30 dl/g, and can be processed under optimal conditions to achieve a gel spun fiber having a tenacity of greater than about 45 g/denier (40.5 g/dtex).Type: ApplicationFiled: June 30, 2011Publication date: November 3, 2011Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Thomas Y. Tam, John A. Young, Norman Aminuddin, John E. Hermes
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Patent number: 7387831Abstract: Drawn multi-filament polyethylene yarns and articles thereof having unique signatures in dynamic mechanical analysis reflective of unique microstructures, and having superior ballistic resistant properties.Type: GrantFiled: November 17, 2006Date of Patent: June 17, 2008Assignee: Honeywell International Inc.Inventors: Conor Twomey, Thomas Y Tam, Ronald A Moore
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Patent number: 7384691Abstract: Drawn multi-filament polyethylene yarns and articles thereof having unique signatures in dynamic mechanical analysis reflective of unique microstructures, and having superior ballistic resistant properties.Type: GrantFiled: November 17, 2006Date of Patent: June 10, 2008Assignee: Honeywell International IncInventors: Conor Twomey, Thomas Y Tam, Ronald A. Moore
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Patent number: 7378147Abstract: Drawn multi-filament polyethylene yarns and articles thereof having unique signatures in dynamic mechanical analysis reflective of unique microstructures, and having superior ballistic resistant properties.Type: GrantFiled: November 17, 2006Date of Patent: May 27, 2008Assignee: Honeywell International Inc.Inventors: Conor Twomey, Thomas Y Tam, Ronald A Moore
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Publication number: 20030194578Abstract: Security articles comprising elements such as filaments, fibers, including hollow fibers, and threads and thin transverse sections and chopped versions thereof, wherein such elements are dispersed within the articles. Particle scattering and luminescent technology is employed based on scattering, electronic, magnetic and/or light properties to provide compound physical coloration responsive to various portions of the electromagnetic spectrum, including ultraviolet, ambient and infrared. The coloration effects can be highly stable or dependent on specific switching effects linked to, e.g., thermal exposure or actinic radiation. The security articles result in advanced levels of security to avoid counterfeiting of objects including banknote and currency paper, stock and bond certificates, identification, credit, debit and ATM cards, drivers' licenses and bar codes.Type: ApplicationFiled: December 2, 2002Publication date: October 16, 2003Applicant: Honeywell International, Inc.Inventors: Thomas Y. Tam, Samir Z. Abdalla, Kwok-Wai Lem, Juergen Wieczoreck
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Patent number: 5579628Abstract: An entangled multifilament yarn made from high strength filaments having a tenacity of at least about 7 g/d, a tensile modulus of at least about 150 g/d and an energy-to-break of at least about 8 J/g. The yarn is used to make ballistic resistant articles.Type: GrantFiled: January 24, 1995Date of Patent: December 3, 1996Assignee: AlliedSignal Inc.Inventors: James J. Dunbar, Chok B. Tan, Gene C. Weedon, Thomas Y. Tam, Alfred L. Cutrone, Elizabeth S. Bledsoe
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Patent number: 5578374Abstract: By poststretching, at a temperature between about 135.degree. and 160.degree. C., a polyethylene fiber, which has already been oriented by drawing at a temperature within 5.degree. C. of its melting point, an ultra high modulus, very low creep, low shrink, high tenacity polyolefin fiber having good strength retention at high temperatures is obtained. The poststretching can be in multiple stages and/or with previous annealing. The poststretching should be done at a draw rate of less than 1 second.sup.-1. Tensile modulus values over 2,000 g/d for multifilament yarn are consistently obtained for ultrahigh molecular weight-polyethylene, with tensile strength values above 30 g/d while at the same time dramatically improving creep (at 160.degree. F. (71.1.degree. C.) and 39,150 psi load) by values at least 25% lower than fiber which has not been poststretched. Shrinkage is improved to values less than 2.5% of the original length when heated from room temperature to 135.degree. C.Type: GrantFiled: February 8, 1995Date of Patent: November 26, 1996Assignee: AlliedSignal Inc.Inventors: James J. Dunbar, Sheldon Kavesh, Dusan C. Prevorsek, Thomas Y. Tam, Gene C. Weedon, Robert C. Wincklhofer
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Patent number: 5434003Abstract: An entangled multifilament yarn, preferably an entangled multifilament polyamide yarn, and a knit fabric made from the same, wherein the yarn has an entanglement strength of at least about 4.5, an entanglement strength coefficient of variance of less than about 1.10, and an average entanglement length for each entanglement of at least about 11.0 mm. The yarn has a knitting performance of at least 4,000 racks/defect.Type: GrantFiled: November 22, 1993Date of Patent: July 18, 1995Assignee: AlliedSignal Inc.Inventors: Robert W. Medeiros, Lisa K. Owen, Thomas Y. Tam, Samir Z. Abdalla
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Patent number: 5397627Abstract: An article including a woven fabric for impeding the passage of air, the fabric having an air permeability of less than about 15 cfm/ft.sup.2 and including at least one multifilament yarn having a longitudinal axis, the yarn being made of high strength filaments having a tenacity of at least about 7 g/d, a tensile modulus of at least about 150 g/d and an energy-to-break of at least about 8 J/g. Preferably, the high strength filaments are extended chain polyethylene.Type: GrantFiled: March 8, 1994Date of Patent: March 14, 1995Assignee: AlliedSignal Inc.Inventors: James J. Dunbar, Chok B. Tan, Gene C. Weedon, Thomas Y. Tam, Alfred L. Cutrone, Elizabeth S. Bledsoe
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Patent number: 5032338Abstract: A method to prepare high strength high modulus polyolefin shaped articles comprising forming a heated solution of the polyolefin from particles of which about 75 to 100% by weight have a particle size of from about 100 to about 400 microns and having a weight average molecular weight of from about 300,000 to 7,000,000, then shaping the heated soltion then cooling the shaped solution. To further increase the strength of the article it can be stretched.Type: GrantFiled: May 22, 1989Date of Patent: July 16, 1991Assignee: Allied-Signal Inc.Inventors: Gene C. Weedon, Thomas Y. Tam, Jim C. Sun