Patents by Inventor Sundergopal Sridhar

Sundergopal Sridhar 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).

  • Recovery of sodium thiocyanate from industrial process solution using nanofiltration technique
    Patent number: 7314606
    Abstract: The present invention relates to a membrane-based nanofiltration process for separating sodium thiocyanate (NaSCN) from industrial solution containing impurities such as ?-sulfopropionic acid, ?-sulfopropionitrile, sodium sulfate and salts of iron and calcium in a single step to obtain a colorless aqueous solution for spinning of acrylic fiber in textile industry.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: January 1, 2008
    Assignee: Council of Scientific and Industrial Research
    Inventors: Sundergopal Sridhar, Suryanarayana Murthy Gorugantu, Suhanya Duraiswamy, Smitha Biduru, Ramakrishna Machiraju
  • Recovery of sodium thiocyanate from industrial process solution using nanofiltration technique
    Publication number: 20050214192
    Abstract: The present invention relates to a membrane-based nanofiltration process for separating sodium thiocyanate (NaSCN) from industrial solution containing impurities such as ?-sulfopropionic acid, ?-sulfopropionitrile, sodium sulfate and salts of iron and calcium in a single step to obtain a colorless aqueous solution for spinning of acrylic fibre in textile industry.
    Type: Application
    Filed: March 29, 2004
    Publication date: September 29, 2005
    Inventors: Sundergopal Sridhar, Suryanarayana Gorugantu, Suhanya Duraiswamy, Smitha Biduru, Ramakrishna Machiraju
  • Oxygen barrier material for packaging
    Publication number: 20050145138
    Abstract: A coating composition for packaging material, and a process for developing packaging material having very low oxygen and water vapour permeability useful for packaging of food materials, particularly oil packaging. The process involves developing a coating composition with calcined clay as the functional additive and coating paper boards to a thickness of 50-100 microns with the coating composition from which suitable packing containers could be fabricated.
    Type: Application
    Filed: December 30, 2003
    Publication date: July 7, 2005
    Applicant: Council of Scientific and Industrial Research
    Inventors: Kothapalli Venkata Raju, Kattimuttathu Suresh, Bhamidipalli Sitaramam, Sundergopal Sridhar, Asad Khan