Patents Represented by Attorney James B. Marshall, Jr.

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  • Silver recovery cartridge for used fixer of neutral or higher pH
    Patent number: 4227681
    Abstract: A method and article for substantially preventing premature obstruction to flow in a canister of a silver recovery device comprising placing a porous pad at the inlet surface of the metallic filler of the canister.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: October 14, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Michael Golben
  • Intermittent compression device
    Patent number: 4206751
    Abstract: A device for applying compressive pressures to a mammal's limb from a source of pressurized fluid comprised of a first and second chamber with the first chamber being fluid impervious and the second chamber being semi-permeable for virtually continuous ventilation. The device has both a means for connecting the chambers to a source of pressurized fluid and a retaining means for positioning and directing the expansion of the chambers on to the limb to provide aid in blood circulating.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: June 10, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John F. Schneider
  • Anthraquino-cycloalkane dyes
    Patent number: 4205005
    Abstract: Dyes of the class consisting of polyanthraquinocycloalkanes and dianthraquinoethenes are useful in giving broad control of the sensitivity of a photoconductor to electromagnetic radiation.
    Type: Grant
    Filed: August 11, 1977
    Date of Patent: May 27, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Judith B. Fahey