Patents by Inventor Ranjan Das

Ranjan Das 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: 20140350405
    Abstract: Method, system and software product for identifying high risk pregnancies comprising the step of generating a spectrogram from ultrasound Doppler signals reflected from the uterine artery and determining the maximum frequency envelope of said spectrogram, and of defining a systolic part and a diastolic part of the maximum frequency envelope and calculating an area ratio under said systolic and diastolic part (AR). This area ratio relates to the blood volume in the uterine artery.
    Type: Application
    Filed: November 26, 2012
    Publication date: November 27, 2014
    Inventors: Pallavi Vajinepalli, Ranjan Das, Celine Firtion, Rajendra Singh Sisodia, Lalit Gupta, Ganesan Ramachandran, Ajay Anand, John Petruzzello
  • Patent number: 7958186
    Abstract: A system includes a portal connected to user interface (UI) components, application logic linking the UI components to a repository layer and connectivity layer through an object access layer, and source systems linked to the repository layer and the connectivity layer.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: June 7, 2011
    Assignee: SAP AG
    Inventors: Nir Kol, Sven Schwerin-Wenzel, Eric Wood, Shai Agassi, Dennis B. Moore, Ranjan Das
  • Publication number: 20040181795
    Abstract: A system includes a portal connected to user interface (UI) components, application logic linking the UI components to a repository layer and connectivity layer through an object access layer, and source systems linked to the repository layer and the connectivity layer.
    Type: Application
    Filed: December 31, 2003
    Publication date: September 16, 2004
    Inventors: Nir Kol, Sven Schwerin-Wenzel, Eric Wood, Shai Agassi, Dennis B. Moore, Ranjan Das
  • Patent number: 5653581
    Abstract: The attachment for securing the stator vanes to the outer compressor case includes hooks strategically located with one set in the center of a segment and one set each at either end of each segment. The segments are assembled end to end to form a ring of an array of rows of airfoils for directing air to the compressor blades of a gas turbine engine. Each assembled segment may include three rows of vanes. The axial gap between the structure of the upstream stage of the compressor, the axial and circumferential gap of radially extending pins attached to the "floating" lug-nuts assembled in each pair of hooks and the tight fit of the pins in the center pair of hooks allow for axial and circumferential thermal expansion and the bolted lug-nuts and outer case provide radial restraint, all of which combine to reduce stresses on the airfoil during engine transient conditions.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: August 5, 1997
    Assignee: United Technologies Corporation
    Inventors: William E. Dixon, Ranjan Das, John A. Visoskis, James J. Delaporte
  • Patent number: 5190439
    Abstract: A method and apparatus for adjusting the angle of variable angle inlet guide vanes provides a non-linear adjustment schedule for a selected vane row as compared to the adjustment schedule for the IGV vane row. The non-linear schedule is conveniently achieved by providing a modified adjustment linkage utilizing a bell crank. The non-linear schedule provides improved engine stall margin at low engine speeds.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: March 2, 1993
    Assignee: United Technologies Corporation
    Inventor: Ranjan Das
  • Patent number: 4925364
    Abstract: An adjustable spacer (20) is located in a unison ring (16) disposed about a gas turbine engine case (18). The spacer (20) includes a pad bolt (44) having a flattened surface (52) for contacting the case (18). The pad bolt (44) is adjusted radially by a threaded cylinder (28) and adjusting nut (36). The assembly is locked in place by a locknut (54) which includes a frangible link (72) for separating a headed portion (70) from a threaded portion (68).
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: May 15, 1990
    Assignee: United Technologies Corporation
    Inventor: Ranjan Das