Patents by Inventor Donald J. McCarty

Donald J. McCarty 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).

  • Method and system for filtration of wastewater
    Patent number: 7396466
    Abstract: A system (10) comprising multiple units (40a-40h) and method for filtration of wastewater (20) is disclosed. Simultaneous denitrification of a single filter unit and normal filtration of the remaining filter units is provided for. Separate flow control systems (36) are described.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: July 8, 2008
    Assignee: Tetra Process Technologies Seven Trent Services Company
    Inventors: Joseph M. Bonazza, Donald J. McCarty, Navin Kadakia, David C. Slack
  • Method for removing nitrogen from wastewater
    Patent number: 5776344
    Abstract: A process and apparatus for treating wastewater containing nitrogen compounds is disclosed. The process includes passing the wastewater to be treated through a biologically active material in one direction to treat the wastewater and passing the treated wastewater through the biologically active material in a second direction to further treat the wastewater under alternating aerobic and anoxic conditions, converting nitrogen compounds to nitrates and nitrites, and converting nitrates and nitrites to gaseous nitrogen.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: July 7, 1998
    Assignee: Tetra Technologies Inc.
    Inventors: Donald J. McCarty, Keith Dobie