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).

  • Patent number: 8961775
    Abstract: 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: Grant
    Filed: July 15, 2014
    Date of Patent: February 24, 2015
    Assignee: Altranex Corporation
    Inventors: Chandrashekhar H. Joshi, Graham Thomas Thornton Gibson, Dzmitry Malevich, Michael Glenn Horner
  • Publication number: 20140323784
    Abstract: 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: Application
    Filed: July 15, 2014
    Publication date: October 30, 2014
    Inventors: Chandrashekhar H. Joshi, Graham Thomas Thornton Gibson, Dzmitry Malevich, Michael Glenn Horner
  • Publication number: 20120197050
    Abstract: 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: Application
    Filed: January 31, 2012
    Publication date: August 2, 2012
    Inventors: CHANDRASHEKHAR H. JOSHI, Michael Glenn Horner
  • Publication number: 20110016776
    Abstract: 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: Application
    Filed: July 22, 2010
    Publication date: January 27, 2011
    Inventor: Chandrashekhar H. Joshi
  • Patent number: 7250839
    Abstract: 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: Grant
    Filed: August 9, 2004
    Date of Patent: July 31, 2007
    Assignee: Energen, Inc.
    Inventors: Livia M. Racz, Chandrashekhar H. Joshi
  • Patent number: 7179339
    Abstract: 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: Grant
    Filed: January 24, 2003
    Date of Patent: February 20, 2007
    Assignee: Energen, Inc.
    Inventors: Chiu-Ying Tai, Chandrashekhar H. Joshi
  • Patent number: 6886331
    Abstract: 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: Grant
    Filed: December 11, 2002
    Date of Patent: May 3, 2005
    Assignee: Energen, Inc.
    Inventor: Chandrashekhar H. Joshi
  • Patent number: 6657515
    Abstract: 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: Grant
    Filed: June 18, 2002
    Date of Patent: December 2, 2003
    Assignee: Energen, LLP
    Inventors: Alfred Pappo, Chandrashekhar H. Joshi
  • Publication number: 20030168295
    Abstract: 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: Application
    Filed: February 12, 2003
    Publication date: September 11, 2003
    Inventors: Zhixiu Han, Anil Mavanur, Chandrashekhar H. Joshi
  • Publication number: 20030108439
    Abstract: 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: Application
    Filed: December 11, 2002
    Publication date: June 12, 2003
    Inventor: Chandrashekhar H. Joshi
  • Publication number: 20020190670
    Abstract: 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: Application
    Filed: June 18, 2002
    Publication date: December 19, 2002
    Inventors: Alfred Pappo, Chandrashekhar H. Joshi
  • Patent number: 6451131
    Abstract: 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: Grant
    Filed: October 2, 2001
    Date of Patent: September 17, 2002
    Assignee: Energen, Inc.
    Inventors: Chiu-Ying Tai, Chandrashekhar H. Joshi
  • Patent number: 6246132
    Abstract: 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: Grant
    Filed: December 29, 1998
    Date of Patent: June 12, 2001
    Assignee: Energen, Inc.
    Inventors: Chandrashekhar H. Joshi, Bruce R. Bent
  • Patent number: 5659277
    Abstract: 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: Grant
    Filed: September 7, 1994
    Date of Patent: August 19, 1997
    Assignee: American Superconductor Corporation
    Inventors: Chandrashekhar H. Joshi, John P. Voccio
  • Patent number: 5585772
    Abstract: 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: Grant
    Filed: January 11, 1995
    Date of Patent: December 17, 1996
    Assignee: American Superconductor Corporation
    Inventors: Chandrashekhar H. Joshi, John P. Voccio, Anthony J. Rodenbush, Carl J. Russo
  • Patent number: 5482919
    Abstract: 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: Grant
    Filed: September 15, 1993
    Date of Patent: January 9, 1996
    Assignee: American Superconductor Corporation
    Inventor: Chandrashekhar H. Joshi
  • Patent number: 5321003
    Abstract: 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: Grant
    Filed: September 18, 1991
    Date of Patent: June 14, 1994
    Assignee: American Superconductor Corporation
    Inventors: Chandrashekhar H. Joshi, Christopher A. Craven
  • Patent number: 5116810
    Abstract: 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: Grant
    Filed: October 16, 1989
    Date of Patent: May 26, 1992
    Assignee: American Superconductor Corporation
    Inventors: Chandrashekhar H. Joshi, Christopher A. Craven
  • Patent number: 4930314
    Abstract: 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: Grant
    Filed: September 8, 1989
    Date of Patent: June 5, 1990
    Assignee: CDC Partners
    Inventors: Sibley C. Burnett, John R. Purcell, William P. Creedon, Chandrashekhar H. Joshi