Patents by Inventor Don H. Rasmussen

Don H. Rasmussen 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).

  • POWDER COATING COMPOSITIONS FOR REDUCING FRICTION AND WEAR IN HIGH TEMPERATURE HIGH PRESSURE APPLICATIONS
    Publication number: 20170130060
    Abstract: The invention provides a powder coating composition comprising of thermoplastic polymers, ceramic particles, and cermet particles for lowering the friction coefficient, and improving wear and corrosion resistance of coated surfaces in high-temperature, high-pressure, and corrosive environments. It also provides a method of coating application for improving adhesion of the coating to the substrate. The coating compositions are devoid of volatile organic solvents and can be applied on surfaces using thermal spraying, compression molding and other particle sintering approaches. A multilayer architecture consisting of an adhesive bottom layer and a non-adhesive, low friction top layer is disclosed. The coating can be used in oil and gas production and seawater injection.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 11, 2017
    Applicant: Vetco Gray Inc.
    Inventors: Sitaraman Krishnan, Janice Losenge Lebga-Nebane, Malavarayan Sankarasubramanian, Gregory S. Chojecki, Don H. Rasmussen, John C. Moosbrugger
  • Controlled microcellular foams of crystalline amorphous polymers
    Patent number: 5369135
    Abstract: Controlled foams of crystalline amorphous polymers include a second phase polymeric material having a transition temperature below that of the matrix polymeric material. The second phase material provides nucleating sites for the growth of gas formed cells which are limited in size by the particle size of the second phase polymeric material.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: November 29, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Gregory A. Campbell, Don H. Rasmussen
  • Controlling heterogeneous nucleation and growth of foams
    Patent number: 5358675
    Abstract: A method of controlling the nucleation of cells in a polymeric foam material includes blending a matrix material with a second phase material which provides sites for bubble nucleation. The selection of the second phase material controls the size and density of the cells.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: October 25, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Gregory A. Campbell, Don H. Rasmussen
  • Preparation of micron sized metal droplets
    Patent number: 4321086
    Abstract: The preparation of micron sized droplets of high melting point metals by shearing the metal in the molten state into micron sized droplets while in a carrier in the form of a molten inorganic salt, glass or gas, in the presence of an oxidizing agent to form a thin protective coating on the micron sized particles while in their molten state and then allowing the formed micron sized particles to solidify.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: March 23, 1982
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: John H. Perepezko, Don H. Rasmussen, Carl R. Loper, Jr.
  • Amorphous metal structures and method
    Patent number: 4282034
    Abstract: Bulk shapes and solid structures of amorphous metals formed of micron sized particles produced by droplet emulsion technique whereby undercooled droplets are solidified in the amorphous state with a stabilizing coating on the surfaces thereof, the shapes and solid structures being formed by dispersing the stabilizing coating and bringing the particles into intimate metal to metal contact for atomic bonding, without raising the temperature to crystallization temperature.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: August 4, 1981
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Jeffery S. Smith, John H. Perepezko, Don H. Rasmussen, Carl R. Loper, Jr.
  • Micron sized spherical droplets of metals and method
    Patent number: 4101310
    Abstract: The preparation of micron sized spherical particles of metals comprising emulsification of the metal in the molten state in a carrier fluid, preferably in the form of an inert liquid, and reacting the molten metal while in the emulsified state in the fluid to form an insoluble reaction product on the surface which stabilizes metal droplets in the emulsion.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: July 18, 1978
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Don H. Rasmussen, Carl R. Loper, Jr.
  • Micron sized spherical droplets of metals and method
    Patent number: 4042374
    Abstract: The preparation of micron sized spherical particles of metals comprising emulsification of the metal in the molten state in a carrier fluid, preferably in the form of an inert liquid, and reacting the molten metal while in the emulsified state in the fluid to form an insoluble reaction product on the surface which stabilizes metal droplets in the emulsion.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: August 16, 1977
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Don H. Rasmussen, Carl R. Loper, Jr.