Patents by Inventor Sreedharan Sasibhushanan

Sreedharan Sasibhushanan 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 high grade synthetic rutile and pig iron
    Patent number: 6306195
    Abstract: The present invention relates to an improved process for the preparation of high grade synthetic rutile from ilmenite with pig iron as a by-product. The process comprises subjecting ilmenite to reduction with coal, cooling and removing unreacted coal to obtain a product having 80-95% metallization, smelting the metallized ilmenite mixed with less than 10% carbon (w/w) in a transferred arc plasma using arc current, under flow of inert gas for a fixed time. The metal is then separated as pig iron and TiO2 as slag, the slag ground followed by oxidation at high temperature in the presence of an oxidizing gas, the oxidized product being leached with dilute HCl followed by filtration, washing and drying to obtain synthetic rutile.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: October 23, 2001
    Assignee: Council of Scientific and Industiral Research
    Inventors: Pawvathu Narayanan Nair Mohan Das, Karval Harikrishna Bhat, Melay Eriyat Kochu Janaki, Sreedharan Sasibhushanan, Parthasarathi Mukherjee, Bishnu Charan Rabindha Mohanty, Hem Shanker Ray