Patents by Inventor Upendra Rohatgl

Upendra Rohatgl 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).

  • Nondestructive testing apparatus and method
    Patent number: 8368289
    Abstract: A laser opto-acoustic apparatus and method is applied for nondestructive testing of defects and residual stresses in solids. A nondestructive testing apparatus may have a piezoelectric transducer for measuring oscillations in a solid. The oscillations or waves may be caused from longitudinal, shear, and/or Raleigh waves in the object to be tested. The nondestructive testing apparatus may also include a laser. The laser is capable of generating the longitudinal, shear, and/or Raleigh waves in the object. One method of performing nondestructive testing of materials may include creating at least one of a longitudinal, shear, and/or Raleigh wave in an object and measuring the speed of the wave in the object. The speed of the waves may be compared with the speed of waves in a material without defects to determine whether the object to be tested has defects.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: February 5, 2013
    Assignee: SpectraQuest, Inc.
    Inventors: Alexander Karabutov, Mikhail Lyamshev, Vladislav Mikhalevich, Manomohan Subudhl, Upendra Rohatgl
  • Nondestructive Testing Apparatus and Method
    Publication number: 20110187233
    Abstract: A laser opto-acoustic apparatus and method is applied for nondestructive testing of defects and residual stresses in solids. A nondestructive testing apparatus may have a piezoelectric transducer for measuring oscillations in a solid. The oscillations or waves may be caused from longitudinal, shear, and/or Raleigh waves in the object to be tested. The nondestructive testing apparatus may also include a laser. The laser is capable of generating the longitudinal, shear, and/or Raleigh waves in the object. One method of performing nondestructive testing of materials may include creating at least one of a longitudinal, shear, and/or Raleigh wave in an object and measuring the speed of the wave in the object. The speed of the waves may be compared with the speed of waves in a material without defects to determine whether the object to be tested has defects.
    Type: Application
    Filed: April 10, 2009
    Publication date: August 4, 2011
    Inventors: Alexander A. Karabutov, Michail Lyamshev, Georgiovich Mikhalevich, Manomohan Subuchi, Leonidovich Lyemshev, Vladislav Mikhalevich, Manomohan Subudhl, Leonidovich Lyamshev, Georgievich Mikhalevich, Manomohan Subudhi, Upendra Rohatgl