Patents by Inventor John T. O'Brien

John T. O'Brien 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).

  • Apparatus and method for detecting seismic waves
    Patent number: 4534020
    Abstract: Disclosed is an apparatus for transducing seismic signals and a method for placing said apparatus for detecting seismic signals. The apparatus comprises at least one geophone preferably embedded in a polymeric material contained in a tubular member. A lower portion of the tubular member preferably contains ballast. The tubular member is preferably cemented into a borehole.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: August 6, 1985
    Assignee: Phillips Petroleum Company
    Inventor: John T. O'Brien
  • Wood splitter
    Patent number: 4310039
    Abstract: A hydraulic wood splitter including a trackway (57) (157) (225) and a carriage (60) (160) (230) movable therealong, the trackway including a main rail (26) (126) (201), a pair of guide rails (50, 51) (150, 151) (213, 220) parallel thereto and spaced therefrom, and a plurality of spaced splitter elements (80, 81) (180, 181) (210, 211, 212), and the carriage including a ram or rams (74) (124) (235, 236) located at all times between said splitter elements: the carriage is reversibly moved along the trackway by actuating means (34) (134a, 134b) (240, 241) and may include a saddle (161) or a pair of saddles (61, 62) (231, 232) mutually spaced in the direction of the trackway.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: January 12, 1982
    Inventor: John T. O'Brien
  • Three component detector and housing for same
    Patent number: 4300220
    Abstract: A detector utilizing three seismometers is provided which is operable to detect three components of particle motion waves.
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: November 10, 1981
    Assignee: Phillips Petroleum Co.
    Inventors: Donald D. Goff, John T. O'Brien
  • Bisulfite terminated oligomers as dispersing agents
    Patent number: 4115435
    Abstract: This invention relates to the use of bisulfite-terminated oligomers as dispersants for solid particulate matter, i.e., low molecular weight bisulfite-terminated polymers containing carboxylate groups and either cyano or carbomethoxy moieties are improved dispersants for solid particulate matter like pigments such as titanium dioxide, clay, calcium carbonate, talc, and zinc oxide, as well as for organic pigments. Particularly, these dispersants have been found useful for stabilizing paper coating compositions.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: September 19, 1978
    Assignee: Uniroyal, Inc.
    Inventors: John T. O'Brien, Woodrow W. White
  • Bisulfite terminated oligomers as dispersing agents
    Patent number: 4004939
    Abstract: This invention relates to the use of bisulfite-terminated oligomers as dispersants for solid particulate matter, i.e., low molecular weight bisulfate-terminated polymers containing carboxylate groups and either cyano or carbomethoxy moieties are improved dispersants for solid particulate matter like pigments such as titanium dioxide, clay, calcium carbonate, talc, and zinc oxide, as well as for organic pigments. Particularly, these dispersants have been found useful for stabilizing paper coating compositions.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: January 25, 1977
    Assignee: Uniroyal Inc.
    Inventors: John T. O'Brien, Woodrow W. White
  • Bisulfite terminated oligomers to prevent scale
    Patent number: 3965028
    Abstract: Scale formation in industrial waters, such as cooling water, is inhibited by adding a bisulfite terminated oligomer such as sodium bisulfite-terminated acrylic acid-acrylonitrile oligomer.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: June 22, 1976
    Assignee: Uniroyal Inc.
    Inventors: John T. O'Brien, Woodrow W. White