Patents by Inventor Eric R. Lindgren

Eric R. Lindgren 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: 6802227
    Abstract: An apparatus for capturing, from gases such as soil gas, target analytes. Target analytes may include emanations from explosive materials or from residues of explosive materials. The apparatus employs principles of sorption common to solid phase microextraction, and is best used in conjunction with analysis means such as a gas chromatograph. To sorb target analytes, the apparatus functions using various sorptive structures to capture target analyte. Depending upon the embodiment, those structures may include a capillary tube including an interior surface on which sorptive material (similar to that on the surface of a SPME fiber) is supported (along with means for moving gases through the capillary tube so that the gases come into close proximity to the sorptive material).
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: October 12, 2004
    Assignee: Sandia Corporation
    Inventors: Eric R. Lindgren, James M. Phelan
  • Publication number: 20020134173
    Abstract: An apparatus for capturing, from gases such as soil gas, target analytes. Target analytes may include emanations from explosive materials or from residues of explosive materials. The apparatus employs principles of sorption common to solid phase microextraction, and is best used in conjunction with analysis means such as a gas chromatograph. To sorb target analytes, the apparatus functions using various sorptive structures to capture target analyte. Depending upon the embodiment, those structures may include a capillary tube including an interior surface on which sorptive material (similar to that on the surface of a SPME fiber) is supported (along with means for moving gases through the capillary tube so that the gases come into close proximity to the sorptive material).
    Type: Application
    Filed: December 19, 2001
    Publication date: September 26, 2002
    Inventors: Eric R. Lindgren, James M. Phelan
  • Patent number: 6405608
    Abstract: An apparatus for capturing, from gases such as soil gas, target analytes. Target analytes may include emanations from explosive materials or from residues of explosive materials. The apparatus employs principles of sorption common to solid phase microextraction, and is best used in conjunction with analysis means such as a gas chromatograph. To sorb target analytes, the apparatus functions using various sorptive structures to capture target analyte.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: June 18, 2002
    Assignee: Sandia Corporation
    Inventors: Eric R. Lindgren, James M. Phelan
  • Patent number: 6221237
    Abstract: Method for collecting and concentrating charged species, specifically, contaminant species in a medium, preferably soil. The method utilizes electrokinesis to drive contaminant species into and through a bed adjacent to a drive electrode. The bed comprises a moderately electrically conductive adsorbent material which is porous and is infused with water or other solvent capable of conducting electrical current. The bed material, preferably activated carbon, is easily removed and disposed of. Preferably, where activated carbon is used, after contaminant species are collected and concentrated, the mixture of activated carbon and contaminant species is removed and burned to form a stable and easily disposable waste product.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: April 24, 2001
    Assignee: Sandia Corporation
    Inventors: Eric R. Lindgren, Earl D. Mattson
  • Patent number: 5676819
    Abstract: A process of remediation of cationic heavy metal contamination from soil utilizes gas phase manipulation to inhibit biodegradation of a chelating agent that is used in an electrokinesis process to remove the contamination, and further gas phase manipulation to stimulate biodegradation of the chelating agent after the contamination has been removed. The process ensures that the chelating agent is not attacked by bioorganisms in the soil prior to removal of the contamination, and that the chelating agent does not remain as a new contaminant after the process is completed.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: October 14, 1997
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Eric R. Lindgren, Patrick V. Brady
  • Patent number: 5435895
    Abstract: There is presented an electrokinetic electrode assembly for use in extraction of soil contaminants from unsaturated soil in situ. The assembly includes a housing for retaining a liquid comprising an electrolyte solution, pure water, and soil water, the housing being in part of porous material capable of holding a vacuum. An electrode is mounted in the housing. The housing is provided with a vacuum orifice for effecting a vacuum within the housing selectively to control flow of soil water through the housing into the chamber and to control outflow of the liquid from the chamber. The assembly further includes conduit means for removing the liquid from the housing and returning the electrolyte solution to the housing, and a conduit for admitting pure water to the housing. There is further presented an electrode system and method for extraction of soil contaminants, the system and method utilizing at least two electrode assemblies as described above.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: July 25, 1995
    Assignee: Sandia Corporation
    Inventors: Eric R. Lindgren, Earl D. Mattson