Patents by Inventor Leon Robinson

Leon Robinson 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 reducing the sulfur content of coal and coal char and the ignition temperature of coal char
    Patent number: 4188191
    Abstract: This invention covers a process for reducing the sulfur content of coal and coal char and the ignition temperature of coal char. Coal is converted into char at temperatures not in excess of about 1600.degree. F. The char is introduced into a caustic system which is maintained at a temperature between about 500.degree. F. to about 750.degree. F. Intimate contact is maintained between the caustic and the char for a period of about 2 to 30 minutes to leach the sulfur from the char. The desulfurized char is thereafter separated from the caustic and washed.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: February 12, 1980
    Assignee: Occidental Petroleum Corporation
    Inventors: James R. Longanbach, Leon Robinson
  • Process for desulfurizing char
    Patent number: 4087514
    Abstract: A process for reducing the sulfur content of char by means of a basic molten bath of an alkali metal or alkaline earth metal salt of a hydroxyaryl or an alcohol.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: May 2, 1978
    Assignee: Occidental Petroleum Corporation
    Inventors: Leon Robinson, Hans F. Bauer
  • Method for desulfurizing char by acid washing and treatment with hydrogen gas
    Patent number: 4054421
    Abstract: This invention covers a process for reducing the sulfur content of char by washing the char with an acid followed by treatment with hydrogen gas.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: October 18, 1977
    Assignee: Occidental Research Corporation
    Inventors: Leon Robinson, Allan Sass
  • Process for reducing the sulfide sulfur content of char with carbon dioxide and H.sub.2 O
    Patent number: 4053285
    Abstract: This invention covers a process for reducing the sulfide sulfur content of char by treatment with a gaseous mixture of carbon dioxide and H.sub.2 O.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: October 11, 1977
    Assignee: Occidental Research Corporation
    Inventors: Leon Robinson, Allan Sass
  • Combination sink cover and cutting board
    Patent number: D449875
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: October 30, 2001
    Inventors: Lavada Fludd-Robinson, Leon Robinson