Patents by Inventor Prashant Joshi

Prashant 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).

  • Publication number: 20080161477
    Abstract: This invention relates to novel sulfur-containing silane coupling agents, and organic polymers containing carbon-carbon double bonds. These novel silanes can be carried on organic and inorganic fillers. The invention also relates to articles of manufacture, particularly tires, made from the elastomer compositions described herein.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Richard W. Cruse, W. Michael York, Eric R. Pohl, Antonlo Chaves, Prashant Joshi
  • Publication number: 20080161463
    Abstract: This invention relates to novel free-flowing filler compositions containing silated cyclic core polysulfide coupling agents, and to a rubber containing the filler composition.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Richard W. Cruse, W. Michael York, Eric R. Pohl, Prashant Joshi
  • Publication number: 20080161590
    Abstract: The invention relates to sulfur silane coupling agents containing multiple blocked mercapto groups which are in a state of reduced activity until activated. The coupling agents are advantageously used in rubber formulations, for example, for fabricating tires with low rolling resistance.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Richard W. Cruse, W. Michael York, Eric R. Pohl, Antonio Chaves, Tiberiu L. Simandan, Prashant Joshi
  • Publication number: 20060281841
    Abstract: Silane compositions of the general formula are provided herein comprising [(RO)x(R1)(3-x)—Si-Mt]q-L-[(Ra)cAr—(CR2?CR22)y]z wherein R and R1 are independently a hydrocarbon group of from 1 to about 20 carbon atoms; R2 are each independently hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; M optionally is a divalent hydrocarbon connecting group of from 1 to about 20 carbon atoms to link the silicon atom and the L group; L is a covalently bound hydrocarbon linking group of from 1 to about 20 carbon atoms or a heteroatom linking group selected from the group consisting of —O—, —S—, —NR3— wherein R3 is hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; Ra is an alkyl group of 1 to 12 carbon atoms; Ar is a substituted or unsubstituted aromatic group; q is an integer of 1 to 4; t and c are each independently 0 or 1; and x, y and z are each independently integers of 1 to 3, inclusive, with the proviso that t is 1 when L is a heteroatom group.
    Type: Application
    Filed: August 13, 2004
    Publication date: December 14, 2006
    Inventors: Keith Weller, Lesley Hwang, Richard Cruse, Leda Gonzalez, Robert Pickwell, Martin Hofstetter, Wesley Sloan, Prashant Joshi
  • Publication number: 20060025506
    Abstract: Silane compositions of the general formula are provided herein comprising [(RO)x(R1)(3-x)—Si-Mt]q-L-[(Ra)cAr—(CR2?CR22)y]z wherein R and R1 are independently a hydrocarbon group of from 1 to about 20 carbon atoms; R2 are each independently hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; M optionally is a divalent hydrocarbon connecting group of from 1 to about 20 carbon atoms to link the silicon atom and the L group; L is a covalently bound hydrocarbon linking group of from 1 to about 20 carbon atoms or a heteroatom linking group selected from the group consisting of —O—, —S—, —NR3— wherein R3 is hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; Ra is an alkyl group of 1 to 12 carbon atoms; Ar is a substituted or unsubstituted aromatic group; q is an integer of 1 to 4; t and c are each independently 0 or 1; and x, y and z are each independently integers of 1 to 3, inclusive, with the proviso that t is 1 when L is a heteroatom group.
    Type: Application
    Filed: July 30, 2004
    Publication date: February 2, 2006
    Inventors: Keith Weller, Lesley Hwang, Richard Cruse, Leda Gonzalez, Robert Pickwell, Martin Hofstetter, Wesley Sloan, Prashant Joshi
  • Publication number: 20050277717
    Abstract: A method for increasing the hardness of silica/rubber mixtures is disclosed wherein the method comprises blending with said mixture at least one silane and a hardness-increasing amount of at least one member selected from the group consisting of thixotropic fumed silica; precipitated silica; an MQ resin wherein Q is SiO4/2, M is R1R2R3SiO1/2, and R1, R2, and R3 are the same or different functional or non-functional organic groups; carbon black; a thermoplastic resin; and a thermosetting resin.
    Type: Application
    Filed: July 8, 2003
    Publication date: December 15, 2005
    Inventors: Prashant Joshi, Antonio Chaves, Lesley Hwang, Michael Stout, Martin Hofstetter, Louis Panzer
  • Publication number: 20020081894
    Abstract: A system and method are provided for interconnecting the generally parallel conductors of a pair of flat circuits out of sequential order relative to each other. The system includes a pair of flat circuits each having a plurality of generally parallel conductors covered by a dielectric film. A pattern of windows are formed in the film of each circuit to expose the conductors at different locations longitudinally thereof. The patterns of windows of the two circuits are coincident with each other when the flat circuits are overlapped with each other and with the circuits oriented so that the conductors of the circuits are at angles relative to each other. The conductors of the respective circuits are electrically connected through the windows.
    Type: Application
    Filed: December 21, 2000
    Publication date: June 27, 2002
    Inventors: Robert M. Fuerst, Prashant Joshi, Yves LePottier, David A. Pfaffinger