Patents by Inventor Srikant M. Oak

Srikant M. Oak 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).

  • Laser welding method for enhanced weld quality and enhanced surface smoothness
    Patent number: 12109649
    Abstract: An improved laser welding method of materials by means of long pulse and high energy pulses of solid state lasers in such a manner that large depth of penetration with full depth or partial depth of penetration can be achieved with minimum surface evaporation in first pass of laser beam and enhanced surface smoothness having average surface smoothness of 5 mm by second pass of laser beam of lower power density and inclined at a particular inclination.
    Type: Grant
    Filed: February 24, 2018
    Date of Patent: October 8, 2024
    Assignee: SECRETARY, DEPARTMENT OF ATOMIC ENERGY
    Inventors: Brahma Nand Upadhyaya, Pushkar Misra, Suresh Chandra Vishwakarma, Rajesh Arya, Srikant M. Oak, Purushottam Das Gupta
  • LASER WELDING METHOD FOR ENHANCED WELD QUALITY AND ENHANCED SURFACE SMOOTHNESS
    Publication number: 20210354240
    Abstract: An improved laser welding method of materials by means of long pulse and high energy pulses of solid state lasers in such a manner that large depth of penetration with full depth or partial depth of penetration can be achieved with minimum surface evaporation in first pass of laser beam and enhanced surface smoothness having average surface smoothness of 5 mm by second pass of laser beam of lower power density and inclined at a particular inclination.
    Type: Application
    Filed: February 24, 2018
    Publication date: November 18, 2021
    Inventors: Brahma Nand UPADHYAYA, Pusbkar MISRA, Suresh Chandra VISHWAKARMA, Raiesh ARYA, Srikant M. OAK, Purushottam Das GUPTA
  • Optical rare-earth doped fiber long period grating based ionizing radiation dose sensor device
    Patent number: 10101467
    Abstract: This invention relates to a sensor device consisting of long period gratings made of rare-earth doped double clad fiber, which is written by CO2 laser irradiation while the fiber is held static, for gamma dose measurement in the range of 150 Gy-2.5 kGy, extendable to 20 kGy, which measurements are real-time and can be from remote locations. The sensor device has high wavelength dip shift sensitivity of at least 2.8 nm/kGy, and its radiation-induced changes are near permanent. The gratings demonstrate negligible temperature sensitivity and the shifts recorded show negligible annealing at room temperature.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: October 16, 2018
    Assignee: SECRETARY, DEPARTMENT OF ATOMIC ENERGY, GOVERNMENT OF INDIA
    Inventors: Sanjay Kher, Smita Chaubey, Jai Kishore, Srikant M. Oak
  • OPTICAL RARE-EARTH DOPED FIBER LONG PERIOD GRATING BASED IONIZING RADIATION DOSE SENSOR DEVICE
    Publication number: 20180045835
    Abstract: This invention relates to a sensor device consisting of long period gratings made of rare-earth doped double clad fiber, which is written by CO2 laser irradiation while the fiber is held static, for gamma dose measurement in the range of 150 Gy-2.5 kGy, extendable to 20 kGy, which measurements are real-time and can be from remote locations. The sensor device has high wavelength dip shift sensitivity of at least 2.8 nm/kGy, and its radiation-induced changes are near permanent. The gratings demonstrate negligible temperature sensitivity and the shifts recorded show negligible annealing at room temperature.
    Type: Application
    Filed: August 11, 2016
    Publication date: February 15, 2018
    Inventors: Sanjay Kher, Smita Chaubey, Jai Kishore, Srikant M. Oak