Patents by Inventor Vytautas Grakauskas

Vytautas Grakauskas 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).

  • Synthesis of geminal dinitro compounds
    Patent number: 4910322
    Abstract: Geminal dinitro compounds are prepared by reacting an organic nitro compound having a replaceable hydrogen on the carbon to which the nitro group is attached with a source of nitrite ions in the presence of an oxidizing agent and a catalytic amount of an alkali metal ferricyanide.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: March 20, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Vytautas Grakauskas, Lee C. Garver, Kurt Baum
  • Synthesis of geminal dinitro compounds
    Patent number: 4774366
    Abstract: Geminal dinitro compounds are prepared by reacting an organic nitro compound having a replaceable hydrogen on the carbon to which the nitro group is attached with a source of nitrite ions in the presence of an oxidizing agent and a catalytic amount of an alkali metal ferricyanide.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: September 27, 1988
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Vytautas Grakauskas, Lee C. Garver, Kurt Baum
  • Synthesis of geminal dinitro compounds
    Patent number: 4594430
    Abstract: Geminal dinitro compounds are prepared by reacting an organic nitro compound having a replaceable hydrogen on the carbon to which the nitro group is attached with a source of nitrite ions in the presence of an oxidizing agent and a catalytic amount of an alkali metal ferricyanide.
    Type: Grant
    Filed: January 31, 1985
    Date of Patent: June 10, 1986
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Vytautas Grakauskas, Lee C. Garver, Kurt Baum
  • Synthesis and polymerization of 3-azidooxetane
    Patent number: 4414384
    Abstract: 3-Azidooxetane, ##STR1## is prepared by reacting 3-oxetyl p-toluenesulfonate with an alkali metal azide in a polar solvent. In the presence of a Lewis acid catalyst, 3-azidooxetane polymerizes to form a poly(3-azidotrimethylene ether) of the formula ##STR2## which can be cured with diisocyanates to form energetic, rubbery polyurethanes.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: November 8, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Phillip T. Berkowitz, Kurt Baum, Vytautas Grakauskas
  • Synthesis of 3-hydroxyoxetane
    Patent number: 4395561
    Abstract: A process for preparing 3-hydroxyoxetane comprising the following steps in order(1) reacting a carboxylic acid of the formula CH.sub.3 (CH.sub.2).sub.
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: July 26, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kurt Baum, Vytautas Grakauskas, Phillip T. Berkowitz
  • 1,3-Bis(2,2,2-fluorodinitroethoxy)-2,2-bis(difluoramino) propane
    Patent number: 4075246
    Abstract: A method for producing 1,3-bis (2,2,2-fluorodinitroethoxy) -2,2-bis (difluoramino) propane by effecting a reaction between difluoramine and 1,3-bis(2,2,2-fluorodinitroethoxy)-2-propanone in a strong acid medium to produce a new high energy plasticizer for advanced energetic propellants.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: February 21, 1978
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kurt Baum, Vytautas Grakauskas