Patents Assigned to Ecova Corporation
  • Biodegradation of aliphatic chloroethylene compounds
    Patent number: 5071755
    Abstract: A method of degrading halogenated aliphatic hydrocarbons is disclosed comprising incubating microorganisms capable of degrading halogenated aliphatic hydrocarbons by an aromatic degradative pathway together with the halogenated aliphatic hydrocarbons under conditions such that said aromatic degradative pathway is active.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: December 10, 1991
    Assignees: Ecova Corporation, The United States of America as represented by the Administrator of the Environmental Protection Agency
    Inventors: Michael J. K. Nelson, Al Willis J. Bourquin, Parmely H. Pritchard
  • Method for stimulating biodegradation of halogenated aliphatic hydrocarbons
    Patent number: 4925802
    Abstract: A method of biodegrading halogenated alipahtic hydrocarbons is disclosed comprising incubating the hydrocarbons with microorganisms capable of degrading halogenated aliphatic hydrocarbons together with a nontoxic, nongaseous substance that induces the biodegrading activity of said microorganisms. An example of the nontoxic, nongaseous substance is an aromatic amino acid, e.g. tryptophan.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: May 15, 1990
    Assignee: Ecova Corporation
    Inventors: Michael J. K. Nelson, Al W. Bourquin