Patents by Inventor Nar Singh

Nar Singh 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).

  • Patent number: 6063720
    Abstract: This invention relates to synthetic garnite tiles made essentially from garnite sand and a process for the production of synthetic garnite tiles essentially from garnet sand which is a by-product of beach sand from rare earths extraction, said process comprising mixing beach sand garnet, feldspar and clay thoroughly; pressing the mixture using a press at a pressure in the range of 40-80 MPa to form tiles of desired shapes and sizes; drying the tiles so formed at a temperature of 100-120.degree. C.; firing the dried tiles at a temperature in the range of 1050-1250.degree. C. with a soaking for a period ranging from 1.5 to 2.5 hours, and polishing the resultant tiles.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: May 16, 2000
    Assignee: Council of Scientific and Industrial Research
    Inventors: Amitabha Kumar, Goutam Banerjee, Dinesh Kumar Das, Nar Singh, Santosh Kumar Haldar
  • Patent number: 5695712
    Abstract: This invention relates to synthetic granite tiles made essentially from garnite sand and a process for the production of synthetic garnite tiles essentially from garnet sand which is a by-product of beach sand from rare earths extraction, said process comprising mixing beach sand garnet, feldspar and clay thoroughly; pressing the mixture using a press at a pressure in the range of 40-80 MPa to form tiles of desired shapes and sizes; drying the tiles so formed at a temperature of 100.degree.-120.degree. C.; firing the dried tiles at a temperature in the range of 1050.degree.-1250.degree. C. with a soaking for a period ranging from 1.5 to 2.5 hours, and polishing the resultant tiles.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: December 9, 1997
    Assignee: Council of Scientific and Industrial Research
    Inventors: Amitabha Kumar, Goutam Banerjee, Dinesh Kumar Das, Nar Singh, Santosh Kumar Haldar