Patent | Date |
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Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof Grant 8,992,774 - Roberts , et al. March 31, 2 | 2015-03-31 |
Dissolved air flotation clarifier Grant 8,518,266 - Roberts , et al. August 27, 2 | 2013-08-27 |
Flume System For A Filter System Including At Least One Filter Having A Fitler Bed That Is Periodically Washed With Liquid, Gas Or A Bombination Thereof App 20130134086 - Roberts; R. Lee ;   et al. | 2013-05-30 |
Underdrain system Grant 8,409,437 - Roberts , et al. April 2, 2 | 2013-04-02 |
Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof Grant 8,333,889 - Roberts , et al. December 18, 2 | 2012-12-18 |
Method of washing a particulate filter bed using an underdrain Grant 8,277,665 - Roberts , et al. October 2, 2 | 2012-10-02 |
Underdrain for a filter system for filtering water or wastewater and a method of washing the filter system Grant 8,070,946 - Roberts , et al. December 6, 2 | 2011-12-06 |
Underdrain system Grant 8,052,870 - Roberts , et al. November 8, 2 | 2011-11-08 |
Underdrain system Grant 8,052,871 - Roberts , et al. November 8, 2 | 2011-11-08 |
System for filtering water or wastewater Grant 7,927,485 - Roberts , et al. April 19, 2 | 2011-04-19 |
System and method for uniformly distributing a fluid through a filter bed in a filter Grant 7,922,903 - Roberts , et al. April 12, 2 | 2011-04-12 |
Method and apparatus for monitoring an underdrain of a filter system Grant 7,921,697 - Roberts April 12, 2 | 2011-04-12 |
Underdrain system Grant 7,820,043 - Roberts , et al. October 26, 2 | 2010-10-26 |
Filter system Grant 7,771,597 - Addison August 10, 2 | 2010-08-10 |
Flume for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof Grant 7,758,750 - Roberts , et al. July 20, 2 | 2010-07-20 |
Method and apparatus for monitoring an underdrain of a filter system Grant 7,754,089 - Roberts July 13, 2 | 2010-07-13 |
System and method for uniformly distributing a fluid through a filter bed in a filter Grant 7,736,506 - Roberts , et al. June 15, 2 | 2010-06-15 |
Filter having a filter layer that forms a protective barrier to prevent clogging of a gravel-less underdrain and method of making the same Grant 7,481,930 - Roberts January 27, 2 | 2009-01-27 |
Underdrain Grant D565,148 - Addison March 25, 2 | 2008-03-25 |
Apparatus for directing fluids through a filter system Grant 7,288,193 - Roberts , et al. October 30, 2 | 2007-10-30 |
System for settling solids or other impurities from water or wastewater and associated methods Grant 7,213,712 - Roberts May 8, 2 | 2007-05-08 |
Filter system and methods of operating the same Grant 6,998,046 - Roberts , et al. February 14, 2 | 2006-02-14 |
Underdrain system Grant 6,991,723 - Roberts , et al. January 31, 2 | 2006-01-31 |
Apparatus for directing fluids through a filter system Grant 6,989,096 - Roberts , et al. January 24, 2 | 2006-01-24 |
Underdrain system Grant 6,982,034 - Roberts , et al. January 3, 2 | 2006-01-03 |
Modular filter system and method of repairing and/or replacing components thereof Grant 6,942,795 - Roberts , et al. September 13, 2 | 2005-09-13 |
Low profile extruded underdrain Grant 6,740,237 - Roberts , et al. May 25, 2 | 2004-05-25 |
Modular filter system Grant 6,616,852 - Roberts , et al. September 9, 2 | 2003-09-09 |
Methods for sludge collection Grant 6,045,709 - Roberts April 4, 2 | 2000-04-04 |
Methods and apparatus for monitoring a filter bed by differential pressure Grant 5,980,755 - Roberts , et al. November 9, 1 | 1999-11-09 |