Patents by Inventor John A. Cobler

John A. Cobler 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 preparing coal suspensions
    Patent number: 4403998
    Abstract: A process for preparing coal suspensions which comprises contacting coal with nitric acid and then combining said contacted coal with an aqueous base solution.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: September 13, 1983
    Assignee: Gulf Research & Development Company
    Inventors: Johann G. D. Schulz, John A. Cobler
  • Bituminous emulsions
    Patent number: 4339346
    Abstract: A bituminous emulsion containing bituminous material, water and the product resulting from the reaction of (1) polycyclic, polycarboxylic acids obtained as a result of the oxidation of coal with (2) a base. The process for preparing such emulsion is also disclosed.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: July 13, 1982
    Assignee: Gulf Research & Development Company
    Inventors: Johann G. D. Schulz, John A. Cobler
  • Hydrocarbon emulsions
    Patent number: 4332695
    Abstract: A hydrocarbon emulsion containing a hydrocarbon, water and the product resulting from the reaction of (1) polycyclic, polycarboxylic acids obtained as a result of the oxidation of coal with (2) a base.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: June 1, 1982
    Assignee: Gulf Research & Development Company
    Inventors: Johann G. D. Schulz, John A. Cobler
  • Coal suspensions and process for preparing same
    Patent number: 4305728
    Abstract: A suspension containing (A) water and (B) the product resulting from the reaction of (1) coal having a neutral equivalent of about 150 to about 485 with (2) a base. The process for preparing such suspension is also claimed.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: December 15, 1981
    Assignee: Gulf Research & Development Company
    Inventors: Johann G. Schulz, John A. Cobler
  • Stable coal-in-oil suspensions and process for preparing same
    Patent number: 4272253
    Abstract: A suspension containing coal, hydrocarbon oil, water and the product resulting from the reaction of (1) polycyclic, polycarboxylic acids obtained as a result of the oxidation of coal with (2) a base. The process for preparing such suspension is also claimed.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: June 9, 1981
    Assignee: Gulf Research & Development Company
    Inventors: Johann G. D. Schulz, John A. Cobler
  • Uniform coal suspensions and process for preparing same
    Patent number: 4261701
    Abstract: A suspension containing coal, water and the product resulting from the reaction of (1) polycyclic, polycarboxylic acids obtained as a result of the oxidation of coal with (2) a base. The process for preparing such suspensions is also claimed.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: April 14, 1981
    Assignee: Gulf Research & Development Company
    Inventors: Johann G. D. Schulz, John A. Cobler