Patents by Inventor Edward F. Hampl, Jr.

Edward F. Hampl, Jr. 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).

  • Thermographic elements
    Patent number: 5318938
    Abstract: Thermographic elements comprising at least two layers, wherein:at least one of the layers comprises polymer, the polymer consisting essentially of, repeating, interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or blends thereof, the polymer being sufficiently low in oligomer content to allow formation of uniform film; andat least one of the layers is an imaging layer, selected from the group consisting of dye-donor layers, image-receiving layers or heat-activatable imaging layers, and a method of thermal imaging using receptor films comprising the polymer described above.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: June 7, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Edward F. Hampl, Jr., Susan K. Jongewaard, Suzanne J. Thompson
  • High purity aromatic polyesters
    Patent number: 5295040
    Abstract: This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: March 15, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Edward F. Hampl, Jr., Mohammad Iqbal
  • High purity aromatic polyesters
    Patent number: 5115372
    Abstract: This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: May 19, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Edward F. Hampl, Jr., Mohammad Iqbal, Suzanne J. Thompson
  • High purity aromatic polyesters
    Patent number: 4967306
    Abstract: This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: October 30, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Edward F. Hampl, Jr., Mohammad Iqbal
  • Hot-junction electrode members for copper/silver chalocogenides
    Patent number: 4268710
    Abstract: Tungsten, molybdenum, and alloys thereof are useful as electrode members for thermoelectric legs made from chalcogenides of copper and/or silver.
    Type: Grant
    Filed: August 29, 1979
    Date of Patent: May 19, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward F. Hampl, Jr.
  • Hot-junction electrode members for copper/silver chalcogenides
    Patent number: 4180415
    Abstract: Tungsten, molybdenum, and alloys thereof are useful as electrode members for thermoelectric legs made from chalcogenides of copper and/or silver.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: December 25, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward F. Hampl, Jr.
  • Hydrostatically extruded thermoelectric legs
    Patent number: 4161111
    Abstract: Thermoelectric legs of useful durability may be prepared by hydrostatic extrusion. In cross-section, the legs may have either circular or non-circular shapes of special usefulness, and the legs may be formed in narrow elongated sizes, which are useful in compact, high-voltage thermoelectric converters.
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: July 17, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward F. Hampl, Jr.
  • Rare-earth-metal-based thermoelectric compositions
    Patent number: 4061505
    Abstract: N-type thermoelectric compositions based on rare-earth metal selected from gadolinium and erbium and chalcogen selected from selenium and tellurium.
    Type: Grant
    Filed: October 15, 1973
    Date of Patent: December 6, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward F. Hampl, Jr.
  • Thermoelectric generators that incorporate self-segmenting thermoelectric legs
    Patent number: 4029520
    Abstract: The contact members used with thermoelectric legs formed from self-segmenting thermoelectric compositions (compositions in which a constituent migrates under the influence of combined thermal and electrical gradients to create a gradation of doping levels that is beneficial for thermoelectric conversion) should be specially chosen to compensate for and best take advantage of the self-segmenting feature. In general, at least an exterior thickness of the contact member against the end of the leg toward which the migrating constituent moves should include the constituent at substantially its free-state chemical potential.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: June 14, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward F. Hampl, Jr.