Patents by Inventor Avinash Gupta

Avinash Gupta 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).

  • Liquefaction of solid carbonaceous material with catalyst recycle
    Patent number: 5122260
    Abstract: In the two stage liquefaction of a carbonaceous solid such as coal wherein coal is liquefied in a first stage in the presence of a liquefaction solvent and the first stage effluent is hydrogenated in the presence of a supported hydrogenation catalyst in a second stage, catalyst which has been previously employed in the second stage and comminuted to a particle size distribution equivalent to 100% passing through U.S. 100 Mesh, is passed to the first stage to improve the overall operation.
    Type: Grant
    Filed: January 9, 1989
    Date of Patent: June 16, 1992
    Assignee: ABB Lummus Crest Inc.
    Inventors: Avinash Gupta, Marvin I. Greene
  • Co-processing of carbonaceous solids and petroleum oil
    Patent number: 5120429
    Abstract: In a process for producing distillates from coal by a first stage thermal liquefaction followed by a catalytic hydrogenation, liquefaction solvent is added at points spaced over the length of the thermal liquefaction heater.Coal may be co-processed with petroleum oil by adding pre-hydrogenated oil to the first stage or unhydrogenated oil to the second stage.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: June 9, 1992
    Assignee: Lummus Crest Inc.
    Inventors: Avinash Gupta, Marvin I. Greene
  • Process for the purification of impure sugar juice
    Patent number: 3982956
    Abstract: Impure sugar solution having a pH of 2 - 6.5 is decolorized by passing the same through a weakly basic anion exchanger having tertiary amine functionality and operated over a hydroxyl form.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: September 28, 1976
    Assignee: The Amalgamated Sugar Company
    Inventors: Karlheinz W. R. Schoenrock, Avinash Gupta, Hugh G. Rounds