Patents by Inventor Ananda M. Wijesinghe

Ananda M. Wijesinghe 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: 5906748
    Abstract: This invention provides a process to tremendously reduce the bulk volume of contaminants obtained from an effluent stream produced subsurface remediation. The chemicals used for the subsurface remediation are reclaimed for recycling to the remediation process. Additional reductions in contaminant bulk volume are achieved by the ultra-violet light destruction of halogenated hydrocarbons, and the complete oxidation of hydrophobic fuel hydrocarbons and hydrophilic hydrocarbons. The contaminated bulk volume will arise primarily from the disposal of the toxic metal ions. The entire process is modular, so if there are any technological breakthroughs in one or more of the component process modules, such modules can be readily replaced.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: May 25, 1999
    Assignee: The Regents of the University of California
    Inventors: Edward J. Kansa, Brian L. Anderson, Ananda M. Wijesinghe, Brian E. Viani
  • Patent number: 5593248
    Abstract: The remediation of heterogeneous subsurfaces is extremely time consuming and expensive with current and developing technologies. Although such technologies can adequately remove contaminants in the high hydraulic conductivity, coarse-grained sediments, they cannot access the contaminated low hydraulic conductivity fine-grained sediments. The slow bleed of contaminants from the fine-grained sediments is the primary reason why subsurface remediation is so time-consuming and expensive. This invention addresses the problem of remediating contaminated fine-grained sediments. It is intended that, in the future, a heterogeneous site be treated by a hybrid process that first remediates the high hydraulic conductivity, coarse-grained sediments, to be followed by the process, described in this invention, to treat the contaminated low hydraulic conductivity fine-grained sediments.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: January 14, 1997
    Assignee: The Regents of the University of California
    Inventors: Edward J. Kansa, Ananda M. Wijesinghe, Brian E. Viani