Patents by Inventor Herman M. Muijs

Herman M. Muijs 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: 6461999
    Abstract: Lubricating additives for drilling fluids are prepared from semi-solid highly viscous and/or high molecular weight lubricants, such as polyalkylenes (e.g., polybutene), by steam jet cooking a mixture of starch, water, and the lubricant in order to uniformly suspend micrometer-sized lubricant droplets in an aqueous starch matrix. These additives avoid the need for toxic emulsifiers, surfactants, or short-chain hydrocarbon solvents for dispersing the lubricants. They impart lubricity to drilling fluids (muds) and also inhibit fluid loss in geological formations by enhancing the filtration control properties of the fluid.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: October 8, 2002
    Assignees: The United States of America as represented by the Secretary of Agriculture, Shrieve Chemical Products
    Inventors: George F. Fanta, Herman M. Muijs, Kenneth Eskins, Frederick C. Felker, Selim M. Erhan
  • Patent number: 5352766
    Abstract: It is herein disclosed process for the preparation of copolymers of carbon monoxide and one or more ethylenically unsaturated compounds by reacting the monomers under polymerization conditions in the presence of a catalyst system based ona) a source of cations of one or more metals of Group VIII of the Periodic Table, andb) a source of anions,in the further presence of a diluent in which the copolymers are insoluble or virtually insoluble and of a minor amount of one or more non-ionic surfactant.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: October 4, 1994
    Assignee: Shell Oil Company
    Inventors: Philip J. M. M. de Smedt, Jan H. Mulder, Herman M. Muijs
  • Patent number: 5062970
    Abstract: A surfactant composition, suitable for enhanced oil recovery comprising in a 60:40 to 10/90 weight ratio a) (o,m)- and/or (o,p)-dialkylbenzene alkali sulfonate and b) polyalkoxyphenyl ether alkali sulfonate.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: November 5, 1991
    Assignee: Shell Oil Company
    Inventors: Herman M. Muijs, Nicolaas C. M. Beers, Sebastianus P. F. M. Roefs
  • Patent number: 5061386
    Abstract: Surfactant composition comprising an alkyl amine ethoxylate and a gel breaker, wherein the gel breaker is a random copolymer of ethylene oxide with propylene oxide/or butylene oxide.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: October 29, 1991
    Assignee: Shell Oil Company
    Inventors: Herman M. Muijs, Jan V. Schaik
  • Patent number: 4693311
    Abstract: A steam foam process for diverting steam within a subterranean reservoir and improving oil displacement is carried out by injecting into the reservoir a steam-foam-forming mixture comprising steam and a linear C.sub.25 -C.sub.30 -.alpha.-olefin sulphonate surfactant, and preferably a non-condensable gas.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: September 15, 1987
    Assignee: Shell Internationale Maatschappij, B.V.
    Inventors: Herman M. Muijs, Paulus P. M. Keijzer
  • Patent number: 4348244
    Abstract: A novel lubricating composition useful in the manufacture of tufted textile articles comprises a polyalkoxylate lubricating oil and a minor amount of a long chain fatty acid.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: September 7, 1982
    Assignee: Shell Oil Company
    Inventors: John D. Shepley, Herman M. Muijs
  • Patent number: 4288331
    Abstract: A novel lubricating composition useful in the manufacture of tufted textile articles comprises a polyalkoxylate lubricating oil and a minor amount of a long chain fatty acid.
    Type: Grant
    Filed: June 13, 1979
    Date of Patent: September 8, 1981
    Assignee: Shell Oil Company
    Inventors: John D. Shepley, Herman M. Muijs
  • Patent number: 4111819
    Abstract: Textile fiber lubricants are disclosed comprising a major amount of (1) the reaction product of (a) at least one C.sub.1 to C.sub.10 alcohol, or (b) at least one C.sub.2 to C.sub.4 alkylene oxide with (c) at least one C.sub.2 to C.sub.4 alkylene oxide, and a minor amount of a polymer of an ethylenically unsaturated carboxylic acid.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: September 5, 1978
    Assignee: Shell Oil Company
    Inventor: Herman M. Muijs