The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2007
Filed:
Mar. 01, 2006
Kalarical Janardhanan Sreeram, Adyar, Chennai-600 020, Tamilnadu, IN;
Harinarain Yamini Shrivastava, Adyar, Chennai-600 020, Tamilnadu, IN;
Balachandran Unni Nair, Adyar, Chennai-600 020, Tamilnadu, IN;
Thirumalachari Ramasami, Adyar, Chennai-600 020, Tamilnadu, IN;
Upadhyayula Venkata Varadaraju, Chennai-600 036, Tamilnadu, IN;
Kalarical Janardhanan Sreeram, Adyar, Chennai-600 020, Tamilnadu, IN;
Harinarain Yamini Shrivastava, Adyar, Chennai-600 020, Tamilnadu, IN;
Balachandran Unni Nair, Adyar, Chennai-600 020, Tamilnadu, IN;
Thirumalachari Ramasami, Adyar, Chennai-600 020, Tamilnadu, IN;
Upadhyayula Venkata Varadaraju, Chennai-600 036, Tamilnadu, IN;
Other;
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.