Patents by Inventor Patrick J. Evans

Patrick J. Evans 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).

  • Bioremediation process using liquefied petroleum gas
    Patent number: 8550750
    Abstract: A method is provided for stimulating anaerobic degradation of a subsurface contaminant, comprising the steps of vaporizing liquefied petroleum gas (LPG) to form a treating gas and directing the treating gas to at least one subsurface injection site that includes the subsurface contaminant; wherein the treating gas stimulates anaerobic degradation of at least a portion of the subsurface contaminant.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: October 8, 2013
    Assignee: CDM Smith Inc.
    Inventors: Patrick J. Evans, Karl Hopfensperger
  • BIOREMEDIATION PROCESS USING LIQUEFIED PETROLEUM GAS
    Publication number: 20110236136
    Abstract: A method is provided for stimulating anaerobic degradation of a subsurface contaminant, comprising the steps of vaporizing liquefied petroleum gas (LPG) to form a treating gas and directing the treating gas to at least one subsurface injection site that includes the subsurface contaminant; wherein the treating gas stimulates anaerobic degradation of at least a portion of the subsurface contaminant.
    Type: Application
    Filed: May 7, 2009
    Publication date: September 29, 2011
    Inventors: Patrick J. Evans, Karl Hopfensperger
  • Dissolved hydrogen analyzer
    Publication number: 20010044154
    Abstract: The present invention provides apparatuses and processes for the measurement of hydrogen in aqueous solution at concentrations as low as about 0.1 nM. The present invention is capable of accurately and reproducibly measuring the concentration of dissolved hydrogen in an aqueous solution that also contains other dissolved gases, such as oxygen, carbon monoxide and sulfur compounds, such as hydrogen sulfide. In a presently preferred embodiment of a hydrogen analyzer 38 of the present invention, water containing dissolved hydrogen is equilibrated with a carrier gas by means of gas flow through a mass transfer device 10.
    Type: Application
    Filed: June 20, 2001
    Publication date: November 22, 2001
    Applicant: Camp Dresser & McKee Inc.
    Inventor: Patrick J. Evans
  • Dissolved hydrogen analyzer
    Patent number: 6277329
    Abstract: The present invention provides apparatuses and processes for the measurement of hydrogen in aqueous solution at concentrations as low as about 0.1 nM. The present invention is capable of accurately and reproducibly measuring the concentration of dissolved hydrogen in an aqueous solution that also contains other dissolved gases, such as oxygen, carbon monoxide and sulfur compounds, such as hydrogen sulfide. In a presently preferred embodiment of a hydrogen analyzer 38 of the present invention, water containing dissolved hydrogen is equilibrated with a carrier gas by means of gas flow through a mass transfer device 10.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: August 21, 2001
    Assignee: Camp Dresser & McKee Inc.
    Inventor: Patrick J. Evans
  • Biodegradation of ethers
    Patent number: 5474934
    Abstract: Ethers including dioxanes are degraded by bringing an ether-containing influent into intimate contact, under growth or resting conditions and in the presence of oxygen, with a culture comprising a bacterium having the characterizing microbiological properties of Amycolata ATCC 55486 or a mutant thereof which retains the characterizing microbiological property of being capable of utilizing dioxane as a sole carbon growth source.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: December 12, 1995
    Assignee: Celgene Corporation
    Inventors: Jean E. Adamus, Harold D. May, Domenic A. Paone, Patrick J. Evans, Rebecca E. Parales
  • Postage control and counter
    Patent number: D278214
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: April 2, 1985
    Assignee: Evcor Systems, Inc.
    Inventor: Patrick J. Evans