Patents by Inventor Thomas Richard Anthony
Thomas Richard Anthony 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: 8216370Abstract: A method for removing defects at high pressure and high temperature (HP/HT) or for relieving strain in a non-diamond crystal commences by providing a crystal, which contains defects, and a pressure medium. The crystal and the pressure medium are disposed in a high pressure cell and placed in a high pressure apparatus, for processing under reaction conditions of sufficiently high pressure and high temperature for a time adequate for one or more of removing defects or relieving strain in the single crystal.Type: GrantFiled: December 12, 2005Date of Patent: July 10, 2012Assignee: Momentive Performance Materials Inc.Inventors: Mark Philip D'Evelyn, Thomas Richard Anthony, Stephen Daley Arthur, Lionel Monty Levinson, John William Lucek, Larry Burton Rowland, Suresh Shankarappa Vagarali
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Patent number: 7323156Abstract: The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.Type: GrantFiled: December 15, 2003Date of Patent: January 29, 2008Assignee: Bellataire International, LLCInventors: Suresh Shankarappa Vagarali, Steven William Webb, William Edwin Jackson, William Frank Banholzer, Thomas Richard Anthony, George Rene Kaplan
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Patent number: 7175704Abstract: A method for removing defects at high pressure and high temperature (HP/HT) or for relieving strain in a non-diamond crystal commences by providing a crystal, which contains defects, and a pressure medium. The crystal and the pressure medium are disposed in a high pressure cell and placed in a high pressure apparatus, for processing under reaction conditions of sufficiently high pressure and high temperature for a time adequate for one or more of removing defects or relieving strain in the single crystal.Type: GrantFiled: June 5, 2003Date of Patent: February 13, 2007Assignee: Diamond Innovations, Inc.Inventors: Mark Philip D'Evelyn, Thomas Richard Anthony, Stephen Daley Arthur, Lionel Monty Levinson, John William Lucek, Larry Burton Rowland, Suresh Shankarappa Vagarali
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Patent number: 6908674Abstract: A jadeite material has a thickness in excess of about 1.0 mm and CIELAB indices of L*>42, a*<?6, and b*>+6. The grain size of the jadeite material is less than about 30 microns and is an equiaxed grain structure. The jadeite material has an optical transmission peak between 500 and 565 nm with an I/IO optical transmission ratio of over 40%. The first step in making the jadeite material is to wrap a glass block, convertible by HP/HT into jadeite and having a nominal composition of NaAlSi2O6, with a graphite or refractive metal sheet. The wrapped glass block is placed in an HP/HT apparatus, rapidly heated, and subjected therein to a pressure in excess of about 3 GPa and a temperature in excess of about 1000° C. for a time adequate to convert the glass block into jadeite. The jadeite material then is cooled and the pressure subsequently released.Type: GrantFiled: March 5, 2001Date of Patent: June 21, 2005Assignee: Diamond Innovations, Inc.Inventors: Suresh Shankarappa Vagarali, Thomas Richard Anthony, John Casey, Robert Charles DeVries, Stephen Lee Dole, John William Lucek, Alan Cameron Smith, Biju Varghese, Steven William Webb
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Patent number: 6887144Abstract: An element-doped diamond crystal is disclosed herein. The crystal includes at least one dopant element which has a greater concentration toward or near an outermost surface of the crystal than in the center of the crystal. The concentration of the dopant element is at a local minimum at least about 5 micrometers below the surface. The concentration-profile of the dopant element for these diamond crystals causes an expansion of the diamond lattice, thereby generating tangential compressive stresses at the surface of the diamond crystal. These stresses beneficially increase the compressive fracture strength of the diamond.Type: GrantFiled: February 14, 2001Date of Patent: May 3, 2005Assignee: Diamond Innovations, Inc.Inventors: Mark Philip D'Evelyn, Dong-Sil Park, Thomas Richard Anthony, Clifford Lawrence Spiro, Yue Meng, Christopher Allen Long
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Publication number: 20040146451Abstract: The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.Type: ApplicationFiled: December 15, 2003Publication date: July 29, 2004Applicants: General Electric Co., Lazare Kaplan International, Inc.Inventors: Suresh Shankarappa Vagarali, Steven William Webb, William Edwin Jackson, William Frank Banholzer, Thomas Richard Anthony, George Rene Kaplan
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Patent number: 6692714Abstract: The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.Type: GrantFiled: January 8, 2003Date of Patent: February 17, 2004Inventors: Suresh Shankarappa Vagarali, Steven William Webb, William Edwin Jackson, William Frank Banholzer, Thomas Richard Anthony, George Rene Kaplan
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Publication number: 20040000266Abstract: A method for removing defects at high pressure and high temperature (HP/HT) or for relieving strain in a non-diamond crystal commences by providing a crystal, which contains defects, and a pressure medium. The crystal and the pressure medium are disposed in a high pressure cell and placed in a high pressure apparatus, for processing under reaction conditions of sufficiently high pressure and high temperature for a time adequate for one or more of removing defects or relieving strain in the single crystal.Type: ApplicationFiled: June 5, 2003Publication date: January 1, 2004Inventors: Mark Philip D'Evelyn, Thomas Richard Anthony, Stephen Daley Arthur, Lionel Monty Levinson, John William Lucek, Larry Burton Rowland, Suresh Shankarappa Vagarali
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Publication number: 20030143150Abstract: The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.Type: ApplicationFiled: January 8, 2003Publication date: July 31, 2003Applicant: GENERAL ELECTRIC COMPANYInventors: Suresh Shankarappa Vagarali, Steven William Webb, William Edwin Jackson, William Frank Banholzer, Thomas Richard Anthony, George Rene Kaplan
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Publication number: 20030031869Abstract: A jadeite material has a thickness in excess of about 1.0 mm and CIELAB indices of L*>42, a*<−6, and b*>+6. The grain size of the jadeite material is less than about 30 microns and is an equiaxed grain structure. The jadeite material has an optical transmission peak between 500 and 565 nm with an I/IO optical transmission ratio of over 40%. The first step in making the jadeite material is to wrap a glass block, convertible by HP/HT into jadeite and having a nominal composition of NaAlSi2O6, with a graphite or refractive metal sheet. The wrapped glass block is placed in an HP/HT apparatus, rapidly heated, and subjected therein to a pressure in excess of about 3 GPa and a temperature in excess of about 1000° C. for a time adequate to convert the glass block into jadeite. The jadeite material then is cooled and the pressure subsequently released.Type: ApplicationFiled: March 5, 2001Publication date: February 13, 2003Inventors: Suresh Shankarappa Vagarali, Thomas Richard Anthony, John Casey, Robert Charles DeVries, Stephen Lee Dole, John William Lucek, Alan Cameron Smith, Biju Varghese, Steven William Webb
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Publication number: 20020081260Abstract: The present invention is directed to a method for treating discolored natural diamond, especially Type IIa diamond and Type IaA/B diamond with nitrogen as predominantly B centers, for improving its color. The method includes placing a discolored natural diamond in pressure transmitting medium powder which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature within the diamond stable range of the carbon phase diagram for a time sufficient to improve the color of said diamond. Finally, the diamond is recovered from said press. Colorless diamond can be made by this method.Type: ApplicationFiled: October 17, 1997Publication date: June 27, 2002Inventors: SURESH SHANKARAPPA VAGARALI, STEVEN WILLIAM WEBB, GEORGE RENE KAPLAN, WILLIAM EDWIN JACKSON, WILLIAM FRANK BANHOLZER, THOMAS RICHARD ANTHONY
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Patent number: 6377340Abstract: A method for detecting whether a natural diamond has been processed at high pressure and high temperature (HPHT) conditions comprises steps of disposing the diamond in a cyrostat that is provided at temperatures equal to or less than liquid nitrogen; illuminating the diamond with a laser beam; recording an optical spectrum of the diamond with a photoluminescence spectrometer; and examining the optical spectrum of the diamond to detect an absence of selected photoluminescent spectral lines.Type: GrantFiled: October 29, 1999Date of Patent: April 23, 2002Assignee: General Electric CompanyInventors: Thomas Richard Anthony, John Kieran Casey, Alan Cameron Smith, Suresh Shankarappa Vagarali
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Publication number: 20010043903Abstract: An element-doped diamond crystal is disclosed herein. The crystal includes at least one dopant element which has a greater concentration toward or near an outermost surface of the crystal than in the center of the crystal. The concentration of the dopant element is at a local minimum at least about 5 micrometers below the surface. The concentration-profile of the dopant element for these diamond crystals causes an expansion of the diamond lattice, thereby generating tangential compressive stresses at the surface of the diamond crystal. These stresses beneficially increase the compressive fracture strength of the diamond.Type: ApplicationFiled: February 14, 2001Publication date: November 22, 2001Inventors: Marl Philip D'Evelyn, Dong-Sil Park, Thomas Richard Anthony, Clifford Lawrence Spiro, Yue Meng, Christopher Allen Long
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Publication number: 20010031237Abstract: The present invention is directed to a method for treating discolored natural diamond, especially Type IIa diamond and Type IaA/B diamond with nitrogen as predominantly B centers, for improving its color. The method includes placing a discolored natural diamond in a pressure transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature within the graphite stable range of the carbon phase diagram for a time sufficient to improve the color of said diamond. Finally, the diamond is recovered from said press. Colorless diamond can be made by this method.Type: ApplicationFiled: September 28, 1998Publication date: October 18, 2001Inventors: SURESH SHANKARAPPA VAGARALI, STEVEN WILLIAM WEBB, WILLIAM EDWIN JACKSON, WILLIAM FRANK BANHOLZER, THOMAS RICHARD ANTHONY
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Patent number: 6281681Abstract: An MRI system is employed to acquire image data using a pulse sequence in which k-space is sampled in a Fibonacci spiral trajectory. A single pulse sequence may be used to sample all of k-space with a single spiral arm, or k-space can be sampled with a plurality of interleaved Fibonacci spiral arms by performing a corresponding series of pulse sequences.Type: GrantFiled: June 21, 1999Date of Patent: August 28, 2001Assignee: General Electric CompanyInventors: Harvey Ellis Cline, Thomas Richard Anthony
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Patent number: 5869133Abstract: An improved method of producing a diamond tube by chemical vapor deposition and a hollow support mandrel used therein. The method comprises depositing a diamond film on an outer side of the hollow mandrel by the CVD process. The mandrel is then etched away by subjecting an inner side of the mandrel to the etching action. It was unexpectedly discovered that the etch time is drastically reduced by using the hollow mandrels.Type: GrantFiled: September 9, 1993Date of Patent: February 9, 1999Assignee: General Electric CompanyInventors: Thomas Richard Anthony, Robert Helmut Ettinger, James Fulton Fleischer
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Patent number: 5817036Abstract: A system for treating a prostate includes an acoustic carrier, a phase fresnel zone in a section of the acoustic carrier, and an acoustic transducer. The phase fresnel zone is formed in the acoustic carrier adjacent a first end of the acoustic carrier and extends at least partially around the outer surface of the acoustic carrier. An acoustic transducer is coupled to a second end of the acoustic carrier. In treating the prostate, which surrounds a urethra, the acoustic carrier is inserted into the urethra and positioned so that the phase fresnel zone is situated in a region of the urethra surrounded by the prostate. Acoustic waves are transmitted into the second end of the acoustic carrier and the phase fresnel zone focuses the acoustic waves to constructively interfere at the location in the prostate. By moving the acoustic carrier, the phase fresnel zone may be moved along at least a portion of the region of the urethra surrounded by the prostate while the acoustic waves are being transmitted.Type: GrantFiled: February 20, 1997Date of Patent: October 6, 1998Assignee: General Electric CompanyInventors: Thomas Richard Anthony, Harvey Ellis Cline