Patents by Inventor David H. Ellenberger

David H. Ellenberger 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 and isolation of metal alkoxides
    Publication number: 20030023105
    Abstract: A method for synthesizing highly soluble metal alkoxides includes the step of reacting a tertiary alcohol having the formula: 1
    Type: Application
    Filed: July 22, 2002
    Publication date: January 30, 2003
    Inventors: Elizabeth R. Burkhardt, Joseph A. Corella, David H. Ellenberger, Christopher P. Sutton
  • Synthesis and isolation of metal alkoxides
    Patent number: 6444862
    Abstract: A method for synthesizing highly soluble metal alkoxides includes the step of reacting a tertiary alcohol having the formula: wherein R1, R2, and R3 are, independently, the same or different, an alkyl group, an alkenyl, an alkynyl group or an aryl group, and at least one of R1, R2, and R3 is a group of at least 3 carbon atoms, with at least a stoichiometric amount of a metal reagent. The metal reagent is generally a group I metal, a group II metal, zinc, a metal alloy of a group I metal, a metal alloy of a group II metal, a metal alloy of zinc, a compound of a group I metal, a compound of a group II metal or a compound of zinc.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: September 3, 2002
    Assignee: Mine Safety Appliances Company
    Inventors: Elizabeth R. Burkhardt, Joseph A. Corella, II, David H. Ellenberger, Christopher P. Sutton
  • Method of synthesis of alkali metal trisubstituted borohydride reagents
    Patent number: 5886229
    Abstract: Synthetic routes for forming alkali metal substituted borohydride compounds include the step of reacting an alkali metal reagent, a hydrogen donor, and a substituted borane. The reactions proceed without the requirement of specialized handling of alkali metal hydrides associated with prior synthetic processes for the production of alkali metal trisubstituted borohydride compounds. A chemical composition comprises solid potassium tri-sec-butyl borohydride.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: March 23, 1999
    Assignee: Mine Safety Appliances Company
    Inventors: Joseph A. Corella, II, David H. Ellenberger, Joerg Bruening
  • Preparation of alkali-metal hexamethydisilazanes
    Patent number: 5420322
    Abstract: A one-step synthesis of an alkali-metal hexamethyldisilazane is provided in which an alkali metal selected from the group consisting of lithium, sodium and potassium is reacted with 1,1,1,3,3,3,-hexamethyldisilazane at a reaction temperature above the melting point of the alkali metal without the use of an electron carrier, alkali-metal derivatized reagents, such as alkyl-aryl organometals, alkali-metal amides and alkali-metal hydrides, or a catalyst.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: May 30, 1995
    Assignee: Mine Safety Appliances Company
    Inventors: Kuen-Wai Chiu, David H. Ellenberger, Joseph M. Barendt
  • Strong base reagent
    Patent number: 5078906
    Abstract: .alpha.-Arylalkanoic acids are prepared by a method comprising the step of reacting an alkylaromatic compound corresponding to the desired .alpha.-arylalkanoic acid with a new metallation reagent solution. The reagent comprises the reaction product of alkyllithium or aryllithium and about two to five molar equivalents of potassium tert-alkoxide in a trialkylamine solvent.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: January 7, 1992
    Assignee: Mine Safety Appliances Company
    Inventors: Kuen-Wai Chiu, Mary H. Staruch, David H. Ellenberger
  • Process for the preparation of .alpha.-arylalkanoic acids
    Patent number: 4910337
    Abstract: .alpha.-Arylalkanoic acids are prepared by a method comprising the step of reacting an alkylaromatic compound corresponding to the desired .alpha.-arylalkanoic acid with a new metallation reagent solution. The reagent comprises the reaction product of alkyllithium or aryllithium and about two to five molar equivalents of potassium tert-alkoxide in a trialkylamine solvent.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: March 20, 1990
    Assignee: Mine Safety Appliances Company
    Inventors: Kuen-Wai Chiu, Mary H. Staruch, David H. Ellenberger