Patents by Inventor Sridhar Chidara

Sridhar Chidara 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).

  • Process for the preparation of dinitramidic acid and salts thereof
    Patent number: 6787119
    Abstract: The present invention provides an ecofriendly method for preparing dinitramidic acid and its salts by nitration of ammonium sulfamate with fuming nitric acid as a nitrating agent using solid acid catalysts selected from the group consisting of a montmorillonite clay catalyst and metal ion exchanged K10 montmorillonite clay catalysts and surface supported catalysts and preparation of ammonium dinitramide by neutralization of the dinitramidic acid with ammonia and separation of ammonium dinitramide.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: September 7, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Boyapati Manoranjan Choudary, Mannepalli Lakshmi Kantam, Katuri Jeeva Ratnam, Vijayakumar Karasala, Sridhar Chidara, Venkatachalam Subbiah, Santosh Gopalakrishnan, Ramaswamy Rajagopalan, Ninan Ninan Kovoor, Kuchibhatla Sitarama Sastri
  • Process for the prepartation of dinitramidic acid and salts thereof
    Publication number: 20030175197
    Abstract: The present invention provides an ecofriendly method for preparing dinitramidic acid and its salts by nitration of ammonium sulfamate with fuming nitric acid as a nitrating agent using solid acid catalysts selected from the group consisting of a montmorillonite clay catalyst and metal ion exchanged K10 montmorillonite clay catalysts and surface supported catalysts and preparation of ammonium dinitramide by neutralization of the dinitramidic acid with ammonia and separation of ammonium dinitramide.
    Type: Application
    Filed: March 13, 2002
    Publication date: September 18, 2003
    Inventors: Boyapati Manoranjan Choudary, Mannepalli Lakshmi Kantam, Katuri Jeeva Ratnam, Vijayakumar Karasala, Sridhar Chidara, Venkatachalam Subbiah, Santosh Gopalakrishnan, Ramaswamy Rajagopalan, Ninan Ninan Kovoor, Kuchibhatla Sitarama Sastri