Patents by Inventor David P. Long

David P. Long 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: 7670680
    Abstract: A device having a substrate, a pair of ferromagnetic leads on a surface of the substrate, laterally separated by a gap, and one or more ferromagnetic microparticles comprising a conductive coating at least partially within the gap. The conductive coating forms at least part of an electrical connection between the leads. A molecular junction may connect the leads to the microparticle.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: March 2, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David P Long, James G Kushmerick, Jr.
  • Patent number: 7482041
    Abstract: A device having a substrate, a pair of ferromagnetic leads on a surface of the substrate, laterally separated by a gap, and one or more ferromagnetic microparticles comprising a conductive coating at least partially within the gap. The conductive coating forms at least part of an electrical connection between the leads. A molecular junction may connect the leads to the microparticle.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: January 27, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David P Long, James G Kushmerick, Jr.
  • Publication number: 20080124550
    Abstract: A device having a substrate, a pair of ferromagnetic leads on a surface of the substrate, laterally separated by a gap, and one or more ferromagnetic microparticles comprising a conductive coating at least partially within the gap. The conductive coating forms at least part of an electrical connection between the leads. A molecular junction may connect the leads to the microparticle.
    Type: Application
    Filed: December 19, 2007
    Publication date: May 29, 2008
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: David P. Long, James G. Kushmerick
  • Patent number: 7318962
    Abstract: A device having a substrate, a pair of ferromagnetic leads on a surface of the substrate, laterally separated by a gap, and one or more ferromagnetic microparticles comprising a conductive coating at least partially within the gap. The conductive coating forms at least part of an electrical connection between the leads. A molecular junction may connect the leads to the microparticle.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: January 15, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David P. Long, James G. Kushmerick
  • Patent number: 6992018
    Abstract: Methods are described for depositing a film or discontinuous layer of discrete clusters, of material (e.g., metals, metal mixtures or alloys, metal oxides, or semiconductors) on the surface of a substrate, e.g., a patterned silicon wafer, by i) dissolving a precursor of the material into a supercritical or near-supercritical solvent to form a supercritical or near-supercritical solution; ii) exposing the substrate to the solution, under conditions at which the precursor is stable in the solution; and iii) mixing a reaction reagent into the solution under conditions that initiate a chemical reaction involving the precursor, thereby depositing the material onto the solid substrate, while maintaining supercritical or near-supercritical conditions. The invention also includes similar methods for depositing material particles into porous solids, and films of materials on substrates or porous solids having material particles deposited in them.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: January 31, 2006
    Assignee: University of Massachusetts
    Inventors: James J. Watkins, Jason M. Blackburn, David P. Long, Jason L. Lazorcik
  • Publication number: 20040229023
    Abstract: Methods are described for depositing a film or discontinuous layer of discrete clusters, of material (e.g., metals, metal mixtures or alloys, metal oxides, or semiconductors) on the surface of a substrate, e.g., a patterned silicon wafer, by i) dissolving a precursor of the material into a supercritical or near-supercritical solvent to form a supercritical or near-supercritical solution; ii) exposing the substrate to the solution, under conditions at which the precursor is stable in the solution; and iii) mixing a reaction reagent into the solution under conditions that initiate a chemical reaction involving the precursor, thereby depositing the material onto the solid substrate, while maintaining supercritical or near-supercritical conditions. The invention also includes similar methods for depositing material particles into porous solids, and films of materials on substrates or porous solids having material particles deposited in them.
    Type: Application
    Filed: December 24, 2003
    Publication date: November 18, 2004
    Applicant: University of Massachusetts, a Massachusetts corporation
    Inventors: James J. Watkins, Jason M. Blackburn, David P. Long, Jason L. Lazorcik
  • Patent number: 6689700
    Abstract: Methods are described for depositing a film or discontinuous layer of discrete clusters, of material (e.g., metals, metal mixtures or alloys, metal oxides, or semiconductors) on the surface of a substrate, e.g., a patterned silicon wafer, by i) dissolving a precursor of the material into a supercritical or near-supercritical solvent to form a supercritical or near-supercritical solution; ii) exposing the substrate to the solution, under conditions at which the precursor is stable in the solution; and iii) mixing a reaction reagent into the solution under conditions that initiate a chemical reaction involving the precursor, thereby depositing the material onto the solid substrate, while maintaining supercritical or near-supercritical conditions. The invention also includes similar methods for depositing material particles into porous solids, and films of materials on substrates or porous solids having material particles deposited in them.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: February 10, 2004
    Assignee: University of Massachusetts
    Inventors: James J. Watkins, Jason M. Blackburn, David P. Long, Jason L. Lazorcik
  • Patent number: 6347445
    Abstract: A method of removing and installing two blades and their mounting spindles from the deck of a lawn mower including holding the spindle heads simultaneously against rotation with a wrench have two operative ends and an adjustable connection connecting the operative ends.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: February 19, 2002
    Inventor: David P. Long, Jr.
  • Publication number: 20010042294
    Abstract: A method of removing and installing two blades and their mounting spindles from the deck of a lawn mower including holding the spindle heads simultaneously against rotation with a wrench have two operative ends and an adjustable connection connecting the operative ends.
    Type: Application
    Filed: February 7, 2000
    Publication date: November 22, 2001
    Inventor: David P. Long