Patents by Inventor James R. Hart
James R. Hart 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: 7494315Abstract: A turbine generator system, having: a rotatable base; and a plurality of rotor vanes extending from the rotatable base, wherein each of the rotor vanes have helical tapered inner and outer surfaces, and wherein each of the rotor vanes is curved to catch flow perpendicular to the axis of rotation of the rotatable base and to direct the flow into a vortical flow between the inner surfaces of the rotor vanes.Type: GrantFiled: May 5, 2006Date of Patent: February 24, 2009Inventor: James R. Hart
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Patent number: 7297747Abstract: Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula: wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.Type: GrantFiled: October 27, 2004Date of Patent: November 20, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Hart, William T. Haygood, Terry J. Burkhardt, Robert T. Li
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Patent number: 7122498Abstract: Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.Type: GrantFiled: June 29, 2001Date of Patent: October 17, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Hart, William T. Haygood, Terry J. Burkhardt, Robert T. Li
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Patent number: 6903229Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula: wherein R3 are identical or different and are each a halogen atom, a C1-C10 alkyl group which may be halogenated, a C6-C10 aryl group which may be halogenated, a C2-C10 alkenyl group, a C7-C40-arylalkyl group, a C7-C40 alkylaryl group, a C8-C40 arylalkenyl group, a —NR?2, —SR?, —OR?, —OSiR?3 or —PR?2 radical, wherein R? is one of a halogen atom, a C1-C10 alkyl group, or a C6-C10 aryl group, and R9 and R11 are identical or different and are a Group 14 radical having from 1 to 20 carbon atoms or are each primary, secondary or tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups, trialkyl silyl groups, or other groups of similar size.Type: GrantFiled: January 31, 2002Date of Patent: June 7, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Jr., Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Patent number: 6886592Abstract: A sewer relief valve assembly comprises a cylindrical sleeve dimensioned for insertion into a clean out which has an interior surface formed as a conduit and exterior threads adapted for mated engagement with the interior threads of the clean out. A valve means is disposed in the cylindrical sleeve which is displaceable from a closed position to an open position by pressurized fluid in the clean out. At least one perforated compartment is disposed inside the cylindrical sleeve which contains a water-soluble disinfectant composition. The valve means is displaceable by fluid pressure to the open position permitting discharge of the effluent through the clean out and the simultaneous release of the water-soluble disinfectant composition from the perforated compartment into the effluent. A water-soluble dye composition can also be included in the perforated compartment so that sewage overflow from the clean out is readily visible.Type: GrantFiled: February 12, 2004Date of Patent: May 3, 2005Inventor: James R. Hart, Jr.
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Patent number: 6870016Abstract: Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula: ? wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.Type: GrantFiled: June 29, 2001Date of Patent: March 22, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry J. Burkhardt, James R. Hart, William T. Haygood, Robert T. Li
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Patent number: 6825372Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula: wherein R9 and R11 are identical or different and are a Group 14 radical having from 1 to 20 carbon atoms or are each primary, secondary or tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups, trialkyl silyl groups, or other groups of similar size.Type: GrantFiled: January 31, 2002Date of Patent: November 30, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Publication number: 20030008767Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: February 5, 2002Publication date: January 9, 2003Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Publication number: 20020165084Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: January 31, 2002Publication date: November 7, 2002Inventors: Terry John Burkhardt, William T. Haygood, Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Publication number: 20020161143Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: January 31, 2002Publication date: October 31, 2002Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Patent number: 6414095Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization The metallocene compositions may be represented by the formula: wherein M1 is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten; R1 and R2 are identical or different, and are one of a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C6-C10 aryloxy group, a C2-C40 alkenyl group, a C7-C40 arylalkyl group, a C7-C40 alkylaryl group, a C8-C40 arylalkenyl group, an OH group or a halogen atom or a conjugated diene which is optionally substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen; R3 are identical or different and are each a hydrogen atom, a halogen atom, a C1-C10 alkyl group which may be halogenaType: GrantFiled: July 19, 2000Date of Patent: July 2, 2002Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6399723Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: June 4, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6380124Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 30, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6380120Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 30, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Udo M. Stehling, James R. Hart, Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta
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Patent number: 6380330Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 30, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6376411Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 23, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6376407Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 23, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6376627Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 23, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Jr., Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Patent number: 6376412Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: April 23, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: D554546Type: GrantFiled: May 31, 2006Date of Patent: November 6, 2007Inventor: James R. Hart