Patents by Inventor Sanjay G. Kulkarni

Sanjay G. Kulkarni 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).

  • Method and apparatus of forming a wrought material having a refined grain structure
    Patent number: 9017602
    Abstract: A method of forming a wrought material having a refined grain structure is provided. The method comprises providing a metal alloy material having a depressed solidus temperature and a low temperature eutectic phase transformation. The metal alloy material is molded and rapidly solidified to form a fine grain precursor that has fine grains surrounded by a eutectic phase with fine dendritic arm spacing. The fine grain precursor is plastic deformed at a high strain rate to cause recrystallization without substantial shear banding to form a fine grain structural wrought form. The wrought form is then thermally treated to precipitate the eutectic phase into nanometer sized dispersoids within the fine grains and grain boundaries and to define a thermally treated fine grain structure wrought form having grains finer than the fine grains and the fine dendritic arm spacing of the fine grain precursor.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: April 28, 2015
    Assignee: Thixomat, Inc.
    Inventors: Raymond F. Decker, Jack Huang, Sanjay G. Kulkarni, Stephen E. Lebeau, Ralph E. Vining
  • METHOD AND APPARATUS OF FORMING A WROUGHT MATERIAL HAVING A REFINED GRAIN STRUCTURE
    Publication number: 20120305145
    Abstract: A method of forming a wrought material having a refined grain structure is provided. The method comprises providing a metal alloy material having a depressed solidus temperature and a low temperature eutectic phase transformation. The metal alloy material is molded and rapidly solidified to form a fine grain precursor that has fine grains surrounded by a eutectic phase with fine dendritic arm spacing. The fine grain precursor is plastic deformed at a high strain rate to cause recrystallization without substantial shear banding to form a fine grain structural wrought form. The wrought form is then thermally treated to precipitate the eutectic phase into nanometer sized dispersoids within the fine grains and grain boundaries and to define a thermally treated fine grain structure wrought form having grains finer than the fine grains and the fine dendritic arm spacing of the fine grain precursor.
    Type: Application
    Filed: February 4, 2011
    Publication date: December 6, 2012
    Inventors: Raymond F. Decker, Jack Huang, Sanjay G. Kulkarni, Stephen E. Lebeau, Ralph E. Vining
  • CALCULATION OF SPREADSHEET DATA
    Publication number: 20110276870
    Abstract: A workbook includes a spreadsheet having cells arranged in columns and rows. The cells include input cells and output cells. The output cells include a formula to be calculated. Calculation of the spreadsheet is divided into multiple tasks. The tasks are assigned among computing nodes within a computing cluster for concurrent calculation of the spreadsheet.
    Type: Application
    Filed: July 15, 2011
    Publication date: November 10, 2011
    Applicant: MICROSOFT CORPORATION
    Inventors: Sanjay G. Kulkarni, Jeffrey J. Wierer, Mingqiang Xu
  • Calculation of spreadsheet data
    Patent number: 8006175
    Abstract: A workbook includes a spreadsheet having cells arranged in columns and rows. The cells include input cells and output cells. The output cells include a formula to be calculated. Calculation of the spreadsheet is divided into multiple tasks. The tasks are assigned among computing nodes within a computing cluster for concurrent calculation of the spreadsheet.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: August 23, 2011
    Assignee: Microsoft Corporation
    Inventors: Sanjay G. Kulkarni, Jeffrey J. Wierer, Mingqiang Xu
  • CALCULATION OF SPREADSHEET DATA
    Publication number: 20090113284
    Abstract: A workbook includes a spreadsheet having cells arranged in columns and rows. The cells include input cells and output cells. The output cells include a formula to be calculated. Calculation of the spreadsheet is divided into multiple tasks. The tasks are assigned among computing nodes within a computing cluster for concurrent calculation of the spreadsheet.
    Type: Application
    Filed: October 29, 2007
    Publication date: April 30, 2009
    Applicant: MICROSOFT CORPORATION
    Inventors: Sanjay G. Kulkarni, Jeffrey J. Wierer, Mingqiang Xu