Patents by Inventor Chandrashekhar H. Joshi
Chandrashekhar H. Joshi 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: 8961775Abstract: Oils from plants and animal fats are hydrolyzed to fatty acids for a Kolbe reaction. The invention relates to a high productivity Kolbe reaction process for electrochemically decarboxylating C4-C28 fatty acids using small amounts of acetic acid to lower anodic passivation voltage and synthesizing C6-C54 hydrocarbons. The C6-C54 undergo olefin metathesis and/or hydroisomerization reaction process to synthesize heavy fuel oil, diesel fuel, kerosene fuel, lubricant base oil, and linear alpha olefin products useful as precursors for polymers, detergents, and other fine chemicals.Type: GrantFiled: July 15, 2014Date of Patent: February 24, 2015Assignee: Altranex CorporationInventors: Chandrashekhar H. Joshi, Graham Thomas Thornton Gibson, Dzmitry Malevich, Michael Glenn Horner
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Publication number: 20140323784Abstract: Oils from plants and animal fats are hydrolyzed to fatty acids for a Kolbe reaction. The invention relates to a high productivity Kolbe reaction process for electrochemically decarboxylating C4-C28 fatty acids using small amounts of acetic acid to lower anodic passivation voltage and synthesizing C6-C54 hydrocarbons. The C6-C54 undergo olefin metathesis and/or hydroisomerization reaction process to synthesize heavy fuel oil, diesel fuel, kerosene fuel, lubricant base oil, and linear alpha olefin products useful as precursors for polymers, detergents, and other fine chemicals.Type: ApplicationFiled: July 15, 2014Publication date: October 30, 2014Inventors: Chandrashekhar H. Joshi, Graham Thomas Thornton Gibson, Dzmitry Malevich, Michael Glenn Horner
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Publication number: 20120197050Abstract: The present invention relates to fuel compositions and methods of making the same. The fuel compositions include hydrocarbon derived from a biological source selected from plant oil, animal fat and combinations thereof. The hydrocarbon and the fuel compositions are at least substantially oxygen-free. In particular, the fuel compositions are useful in cold temperature environments and as aviation fuel.Type: ApplicationFiled: January 31, 2012Publication date: August 2, 2012Inventors: CHANDRASHEKHAR H. JOSHI, Michael Glenn Horner
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Publication number: 20110016776Abstract: The present invention relates to a fuel composition and method for the preparation thereof. The fuel composition is particularly useful as an aviation fuel and as a ground transportation fuel in cold weather environments. The fuel composition includes oil derived from a biological source such as vegetable oil and/or animal fat. Further, the fuel composition can be based on biodiesel. Moreover, the fuel composition of the present invention includes a reduced amount of oxygen as compared to the biodiesel or substantially no oxygen.Type: ApplicationFiled: July 22, 2010Publication date: January 27, 2011Inventor: Chandrashekhar H. Joshi
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Patent number: 7250839Abstract: Magnetostrictive actuator. The actuator includes a flexible substrate and a magnetostrictive film on the substrate. The shape of the flexible substrate is altered in the presence of a magnetic field.Type: GrantFiled: August 9, 2004Date of Patent: July 31, 2007Assignee: Energen, Inc.Inventors: Livia M. Racz, Chandrashekhar H. Joshi
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Patent number: 7179339Abstract: A terbium-dysprosium-iron magnetostrictive material of the type Tb1-xDyxFe2-y wherein x is less than 0.7, and y is less than or equal to 0.1, and devices using these materials.Type: GrantFiled: January 24, 2003Date of Patent: February 20, 2007Assignee: Energen, Inc.Inventors: Chiu-Ying Tai, Chandrashekhar H. Joshi
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Patent number: 6886331Abstract: A magnetohydraulic motor with a positive displacement pump that pumps hydraulic fluid to and from the two sides of a bi-directional piston that provides the motor's output force and motion. Motion control is provided by properly controlling valves that selectively open and close fluid passageways between the actuator member and each side of the piston.Type: GrantFiled: December 11, 2002Date of Patent: May 3, 2005Assignee: Energen, Inc.Inventor: Chandrashekhar H. Joshi
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Patent number: 6657515Abstract: A tuning mechanism for a superconducting radio frequency particle accelerator cavity, wherein the cavity comprises a number of axially aligned cells held by a frame, with at least one active cell that is axially stretchable to tune the resonant frequency of the cavity. The tuning mechanism comprises a lever arm having a center of rotation, one or more mechanical members coupling the lever arm to an active cell, and a motor adapted to move the lever arm, to thereby move the active cell through the mechanical members.Type: GrantFiled: June 18, 2002Date of Patent: December 2, 2003Assignee: Energen, LLPInventors: Alfred Pappo, Chandrashekhar H. Joshi
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Publication number: 20030168295Abstract: A vibration isolation system, with an actuator having two nested, relatively movable members defining an interior portion, and a magnetostrictive member coupled to both nested members and within the interior portion. A variable-strength magnetic field is applied to the magnetostrictive member, for controlling the elongation of the magnetostrictive member, to thereby control the relative positions of the two nested members.Type: ApplicationFiled: February 12, 2003Publication date: September 11, 2003Inventors: Zhixiu Han, Anil Mavanur, Chandrashekhar H. Joshi
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Publication number: 20030108439Abstract: A magnetohydraulic motor with a positive displacement pump that pumps hydraulic fluid to and from the two sides of a bi-directional piston that provides the motor's output force and motion. Motion control is provided by properly controlling valves that selectively open and close fluid passageways between the actuator member and each side of the piston.Type: ApplicationFiled: December 11, 2002Publication date: June 12, 2003Inventor: Chandrashekhar H. Joshi
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Publication number: 20020190670Abstract: A tuning mechanism for a superconducting radio frequency particle accelerator cavity, wherein the cavity comprises a number of axially aligned cells held by a frame, with at least one active cell that is axially stretchable to tune the resonant frequency of the cavity. The tuning mechanism comprises a lever arm having a center of rotation, one or more mechanical members coupling the lever arm to an active cell, and a motor adapted to move the lever arm, to thereby move the active cell through the mechanical members.Type: ApplicationFiled: June 18, 2002Publication date: December 19, 2002Inventors: Alfred Pappo, Chandrashekhar H. Joshi
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Patent number: 6451131Abstract: A Terbium-Dysprosium-Iron magnetostrictive material of the type Tb1−xDyxFe2−y wherein x is less than 0.7, and y is less than or equal to 0.1, and devices using these materials.Type: GrantFiled: October 2, 2001Date of Patent: September 17, 2002Assignee: Energen, Inc.Inventors: Chiu-Ying Tai, Chandrashekhar H. Joshi
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Patent number: 6246132Abstract: A magnetostrictive actuator, comprising: a magnetostrictive member which elongates upon application of a magnetic field; a translating member mechanically coupled to the magnetostrictive member, for translating the change in length of the magnetostrictive member into a desired action; and a selectively-energized coil surrounding the magnetostrictive member, to apply a magnetic field to the magnetostrictive member, and thus selectively change the length of the magnetostrictive member, and thereby cause the translating member to create the desired action.Type: GrantFiled: December 29, 1998Date of Patent: June 12, 2001Assignee: Energen, Inc.Inventors: Chandrashekhar H. Joshi, Bruce R. Bent
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Patent number: 5659277Abstract: A superconducting magnetic coil formed of anisotropic high temperature superconducting material includes ferromagnetic flanges positioned coaxial to the longitudinal axis of the coil and at the ends of the superconducting coil to capture magnetic flux emanating from the coil so that the maximum perpendicular magnetic field at the end regions is reduced. A reduction in the maximum perpendicular magnetic field increases the critical current at the end regions thereby increasing the critical current at these regions and maintaining an overall higher critical current of the coil.Type: GrantFiled: September 7, 1994Date of Patent: August 19, 1997Assignee: American Superconductor CorporationInventors: Chandrashekhar H. Joshi, John P. Voccio
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Patent number: 5585772Abstract: An actuator in which a magnetostrictor is subjected to magnetic fields produced by a superconducting coil, and the magnetostrictor and coil are maintained at temperatures below the magnetic transition temperature of the magnetostrictor and the superconducting temperature of the coil, typically at temperatures in the range of about 4 to about 130 degrees Kelvin. The magnetostrictor is a laminated Terbium Dysprosium (TbDy) alloy structure and the coil includes high temperature superconducting oxide material. The laminations of the TbDy structure are mechanically loaded in compression and each has a thickness substantially equal less than or equal to the depth of field penetration, and a cooler maintains both the TbDy and superconductor at their optimum temperatures.Type: GrantFiled: January 11, 1995Date of Patent: December 17, 1996Assignee: American Superconductor CorporationInventors: Chandrashekhar H. Joshi, John P. Voccio, Anthony J. Rodenbush, Carl J. Russo
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Patent number: 5482919Abstract: The superconducting rotor includes at least one field coil made of a superconductor material having a given superconducting transition temperature. A cryocooler system is mounted for rotation with the rotor. The cryocooler includes a cold head portion mounted in heat transfer relation with the field coil to cool the field coil to a temperature below its transition temperature and includes a piston/regenerator adapted to allow passage of a working fluid at a mass flow rate which is substantially uniform over the cross-section of the piston/regenerator during operation of the system. Heat is conducted away from the field coils by heat pipes or by conduction through high thermally conductive material. Mounting the cryocooler cold head for rotation with the rotor eliminates the use of a cryogenic liquid pool for rotor cooling.Type: GrantFiled: September 15, 1993Date of Patent: January 9, 1996Assignee: American Superconductor CorporationInventor: Chandrashekhar H. Joshi
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Patent number: 5321003Abstract: An autogenous superconducting joint metallurgically bonding a pair of shaped superconducting pieces. Each of the pieces is formed by combining the metallic elements of a superconducting oxide in substantially the stoichiometric proportions needed to form the superconducting oxide, and then forming the combined metallic elements into a shaped piece. The microstructure of the joint is substantially the same as that of the portions of the pieces adjacent the joint.Type: GrantFiled: September 18, 1991Date of Patent: June 14, 1994Assignee: American Superconductor CorporationInventors: Chandrashekhar H. Joshi, Christopher A. Craven
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Patent number: 5116810Abstract: The invention relates to a process for making a superconducting connection between a pair of superconducting ceramic oxide pieces, each of the pieces having been formed by combining the metallic elements of the superconducting oxide in substantially the stoichiometric proportions needed to form the superconducting oxide into a precursor and forming the precursor into a shaped piece. The process comprises the steps of: contacting each of the shaped pieces with the other; connecting each of the shaped pieces to the other by means for forming a metallurgical bond between the shaped pieces; and oxidizing the connected shaped pieces under conditions sufficient to oxidize the metallic elements to the superconducting oxide.In other embodiments of the invention, the process is for forming a superconducting connection between a pair of pieces having a superconducting ceramic oxide/noble metal composition; or for forming a joint between a superconducting ceramic oxide and a normal conductor.Type: GrantFiled: October 16, 1989Date of Patent: May 26, 1992Assignee: American Superconductor CorporationInventors: Chandrashekhar H. Joshi, Christopher A. Craven
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Patent number: 4930314Abstract: Improved Stirling cycle machine including at least a pair of eccentric disks fixed to a pair of rotatable shafts in phase with each other and which eccentric disks upon rotation of the shafts (in opposite directions in the preferred embodiment) also rotate (in opposite directions in the preferred embodiment) and impart upward movement to a bellows defining a variable-volume compression or expansion chamber with a reduced tendency to also impart side thrust, rocking motion, or lateral movement to the bellows whereby bellows wear is reduced and the life of the bellows and the Stirling cycle machine is increased.Type: GrantFiled: September 8, 1989Date of Patent: June 5, 1990Assignee: CDC PartnersInventors: Sibley C. Burnett, John R. Purcell, William P. Creedon, Chandrashekhar H. Joshi