Patents by Inventor Kalarical Janardhanan Sreeram

Kalarical Janardhanan Sreeram 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 making wet-pink leather
    Patent number: 7252687
    Abstract: A process of combination tannage is disclosed whereby Zirconium salt is complexed with THP salt to produce wet pink leather without using any conventional dye. The resulting leathers exhibit a shrinkage temperature of more than 100° C., and other properties comparable to those of conventionally processed leathers.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: August 7, 2007
    Assignee: Council of Scientific and Industrial Research
    Inventors: Murugan Chandrabose, Nishtar Nishad Fathima, Kalarical Janardhanan Sreeram, Jonnalagadda Raghava Rao, Balachandran Unni Nair, Thirumalachari Ramasami
  • Nano sized sulfide compounds of cerium and a process for the preparation thereof
    Patent number: 7247291
    Abstract: The present invention relates to nano sized sulfide compounds of cerium and a process for the preparation thereof. More particularly, the present invention provides novel nano sized particles of cerium sulfide as well as a novel process for the preparation of nano sized sulfide compounds of cerium by the bioreduction of cerium sulfate or cerium acetate, without resorting to chemical methods. A bioprocess is disclosed to treat trivalent Cerium salt with sulfate-reducing bacteria (SRB) under controlled conditions to obtain a biomass, which is subjected to staggered heating upto a temperature of 600-1500° C. The sulfide of Cerium is finally separated for application in pigment industry.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: July 24, 2007
    Inventors: Kalarical Janardhanan Sreeram, Harinarain Yamini Shrivastava, Balachandran Unni Nair, Thirumalachari Ramasami, Upadhyayula Venkata Varadaraju
  • Process for simultaneous recovery of chromium and iron from chromite ore processing residue
    Patent number: 7220394
    Abstract: The present invention relates to a process for simultaneous recovery of chromium and iron from Chromite Ore Processing Residue (COPR) and more particularly, the present invention relates to an economical and environment-friendly process for recovering chromium as a chromate salt and iron as an iron salt from non-leachable Chromite Ore Processing Residue and avoids landfilling of toxic metals.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: May 22, 2007
    Assignee: Council of Scientific and Industrial Research
    Inventors: Kalarical Janardhanan Sreeram, Thirumalachari Ramasami
  • Process for simultaneous recovery of chromium and iron from Chromite Ore Processing Residue
    Publication number: 20040086438
    Abstract: The present invention relates to a process for simultaneous recovery of chromium and iron from Chromite Ore Processing Residue (COPR) and more particularly, the present invention relates to an economical and environment-friendly process for recovering chromium as a chromate salt and iron as an iron salt from non-leachable Chromite Ore Processing Residue and avoids landfilling of toxic metals.
    Type: Application
    Filed: November 20, 2002
    Publication date: May 6, 2004
    Inventors: Kalarical Janardhanan Sreeram, Thirumalachari Ramasami