Patents by Inventor Gopal A. Krishnagopalan

Gopal A. Krishnagopalan 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).

  • Publication number: 20120168102
    Abstract: A method for producing pulp by extracting hemicellulosic materials from lignocellulosic materials using water in an extraction stage, wherein the extraction stage is either a single extraction or a double extraction process; treating the lignocellulosic materials with an oxidizing agent in a treatment stage, wherein the treatment stage is selected from the group consisting of a second extraction process, an agent impregnation process, and a first pretreatment process; treating the lignocellulosic materials with a reducing agent in the treatment stage, wherein the treatment stage is selected from the group consisting of the second extraction process, the agent impregnation process, and a second pretreatment process; and then subjecting the lignocellulosic materials to a modified Kraft pulping process to produce pulp.
    Type: Application
    Filed: April 2, 2010
    Publication date: July 5, 2012
    Inventors: Sung-Hoon Yoon, Harry T. Cullinan, Gopal A. Krishnagopalan
  • Publication number: 20030204988
    Abstract: This invention provides a process for propagation of mimosa (Albizia julibrissin) and utilization of this plant species as forage for livestock, in food plots for deer, as a source of raw material for pulp and paper production, production of composite materials, and as a source of biomass for production of bioenergy.
    Type: Application
    Filed: September 12, 2002
    Publication date: November 6, 2003
    Inventors: David I. Bransby, Steve R. Duke, Gopal A. Krishnagopalan
  • Patent number: 5304330
    Abstract: A new class of composites results from a matrix of fibers, such as fibers of carbon, alumina, ceramics, and aluminosilicates, interwined in a network of fused metal fibers. The composites can be fabricated to have varying surface area, void volume, and pore size while maintaining high electrical conductivity. Composites are readily prepared from a preform of a dispersion of the metal fibers, other fibers, and an organic binder such as cellulose, by heating the preform at a temperature sufficient to fuse the metal fibers and to volatilize at least 90% of the binder. Where a carbon fiber is used, the metal fibers are fused at a temperature causing a loss of less than about 25%, and usually under 15%, by weight of carbon fiber.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: April 19, 1994
    Assignee: Auburn University
    Inventors: Bruce J. Tatarchuk, Millard F. Rose, Gopal A. Krishnagopalan, John N. Zabasajja, David A. Kohler