Patents by Inventor Johst H. Burk

Johst H. Burk 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).

  • Patent number: 5498358
    Abstract: A lubricant composition for an internal combustion engine contains a lubricant basestock and an effective amount for antiwear properties of an oligomer containing at least one mesogenic segment and at least one flexible segment. The oligomer can have a centrally disposed flexible segment, e.g., derived from a polyalkylene glycol such as polypropylene glycol, with mesogenic segments as end caps or it can contain alternating flexible and mesogenic segments, e.g., comprising a repeat unit comprising aromatic ester groups and at least one linear polyalkylene spacer. The oligomer preferably has a molecular weight of from about 1,000 to about 4,000 and is present at from about 0.1% to about 3%, by weight of the basestock.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: March 12, 1996
    Assignee: Akzo Nobel N.V.
    Inventors: Ki-Soo Kim, Sophia Dashevsky, Johst H. Burk
  • Patent number: 5368768
    Abstract: Solubilized metal (dialkylaminoalcoholate) compounds in organic solvent can serve as a source of metal values for metal oxide-containing superconductor compositions. Stable solutions, resistant to precipitation problems, can be formed by reaction of a dialkylaminoalkanol with a metal alkoxide followed by removal of by-product alkanol by vacuum distillation below the reflux temperature of the solution. Exemplary metals include copper, yttrium, barium, calcium, and bismuth, lanthanum and strontium.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: November 29, 1994
    Assignee: Akzo Nobel Inc.
    Inventors: Carl C. Greco, Johst H. Burk
  • Patent number: 5338716
    Abstract: Supported non-oxide metal carbide-containing catalysts are provided which comprise: (a) an oxide support, such as alumina or cordierite; (b) a passivating layer of a ceramic, such as silicon carbide; and (c) a non-oxide metal ceramic catalytic component, such as a Group VI metal carbide or nitride, preferably tungsten carbide or molybdenum carbide.
    Type: Grant
    Filed: December 1, 1992
    Date of Patent: August 16, 1994
    Assignee: Akzo Nobel nv
    Inventors: Kelly B. Triplett, Johst H. Burk, Fawzy G. Sherif, Willem Vreugdenhil
  • Patent number: 5321161
    Abstract: Nitriles can be hydrogenated to amines by heating the nitrile in the presence of hydrogen and a tungsten carbide catalyst, such as are formed by the calcination of a tungsten salt with an acyclic compound containing-nitrogen-hydrogen bonding.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: June 14, 1994
    Assignee: Akzo nv
    Inventors: Willem Vreugdenhil, Fawzy G. Sherif, Johst H. Burk, James F. Gadberry
  • Patent number: 5252247
    Abstract: Solubilized metal (dialkylaminoalcoholate) compounds in organic solvent can serve as a source of metal values for metal oxide-containing superconductor compositions. Stable solutions, resistant to precipitation problems, can be formed by reaction of a dialkylaminoalkanol with a metal alkoxide followed by removal of by-product alkanol by vacuum distillation below the reflux temperature of the solution. Exemplary metals include copper, yttrium, barium, calcium, and bismuth, lanthanum and strontium.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: October 12, 1993
    Assignee: Akzo America Inc.
    Inventors: Carl C. Greco, Johst H. Burk
  • Patent number: 5142078
    Abstract: Aluminum alkoxides can be formed by reaction of aluminum metal and alcohol in the presence of soluble titanium (e.g., derived from a titanium carboxylate) as the catalyst for the reaction.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: August 25, 1992
    Assignee: Akzo nv
    Inventors: Fawzy G. Sherif, Johst H. Burk
  • Patent number: 5034549
    Abstract: Silicon or siloxane diols react with dicyclopentadienyl zirconium compounds to form catalytically active compositions. These compositions can be used to polymerize ethylene when combined with methylaluminoxane.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: July 23, 1991
    Assignee: Akzo N.V.
    Inventors: Andrzej M. Piotrowski, Elliot I. Band, Johst H. Burk
  • Patent number: 4996300
    Abstract: The reaction of rare earth metals and alcohols, to form rare earth alkoxides, is catalyzed by the use of a zinc-containing catalyst, e.g., zinc and/or zinc chloride.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: February 26, 1991
    Assignee: Akzo America Inc.
    Inventors: Carl C. Greco, Johst H. Burk
  • Patent number: 4988800
    Abstract: The reaction of rare earth metals and alcohols, to form rare earth alkoxides, is catalyzed by the use of an inorganic, halide-free mercury salt (e.g., mercury nitrate or mercury sulfate).
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: January 29, 1991
    Assignee: Akzo America Inc.
    Inventors: Carl C. Greco, Johst H. Burk
  • Patent number: 4681959
    Abstract: A number of processes for the formation of insoluble metal alkoxides are disclosed. In one embodiment, there is disclosed a two step process wherein a halide of an at least divalent metal is reacted with an appropriate alcohol in the first step. In the second step, the intermediate compound formed is then reacted with more alcohol, said alcohol forming part of a solvent system in which the final metal alkoxide formed is insoluble. In another embodiment, a two step process is disclosed wherein the intermediate formed in the first step is isolated, and then in the second step the intermediate is reacted with an appropriate alcohol to yield the final product. The final embodiment of the present invention comprises a one step process for the production of insoluble metal alkoxides wherein a halide of an at least divalent metal is reacted with an appropriate alcohol in the presence of an excess amount of a hydrogen halide acceptor in a solvent in which the hydrogen halide compound formed is soluble.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: July 21, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Richard J. Ayen, Johst H. Burk, Carl C. Greco
  • Patent number: 4347325
    Abstract: Novel self-setting potassium-aluminum-phosphate compositions of matter are prepared by forming an aqueous slurry of a potassium source, an aluminum source and a phosphate source; mixing the slurry for a period of time sufficient to form a reactive, creamy mass having a viscosity of at least 2000 cps; and setting or curing the reactive creamy mass. The product is porous, can be foamed or nonfoamed, adheres well to substrates and when foamed, can be lightweight.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: August 31, 1982
    Assignee: Stauffer Chemical Company
    Inventors: Christian G. Michel, Carolyn A. Ertell, Johst H. Burk