Assignee
ROBERTS FILTER MFG
12 granted patents·437 citations·filing 1978–1994
Top patents by PatentIndex Score
12 records- 0191US4619765AFilter bottom constructionROBERTS FILTER MFG·Filed 1984·Granted Oct 28, 1986·71 cites·8 claims
- 0280US5534202AAir grid for underdrains and similar systemsROBERTS FILTER MFG·Filed 1994·Granted Jul 9, 1996·44 cites·15 claims
- 0379US4187175ATreatment facility with backwash control systemROBERTS FILTER MFG·Filed 1978·Granted Feb 5, 1980·47 cites·23 claims
- 0478US4177147ABiological treating systemsROBERTS FILTER MFG·Filed 1978·Granted Dec 4, 1979·29 cites·15 claims
- 0577US4750999AFilter employing barrierROBERTS FILTER MFG·Filed 1986·Granted Jun 14, 1988·41 cites·23 claims
- 0674US4364830AFilter bottomROBERTS FILTER MFG·Filed 1981·Granted Dec 21, 1982·32 cites·10 claims
- 0772US5413710ALateral underdrainROBERTS FILTER MFG·Filed 1993·Granted May 9, 1995·36 cites·15 claims
- 0872US5080808AMethod of washing an upflow filter and filter bed employed in said filterROBERTS FILTER MFG·Filed 1990·Granted Jan 14, 1992·40 cites·18 claims
- 0969US5198124AUpflow filter and method of washing sameROBERTS FILTER MFG·Filed 1992·Granted Mar 30, 1993·34 cites·17 claims
- 1063US5314630ASystems and methods for clarifying liquidsROBERTS FILTER MFG·Filed 1993·Granted May 24, 1994·27 cites·7 claims
- 1158US5061080ARotary agitatorROBERTS FILTER MFG·Filed 1990·Granted Oct 29, 1991·26 cites·5 claims
- 1246US5127582ANozzles for rotary agitatorsROBERTS FILTER MFG·Filed 1990·Granted Jul 7, 1992·10 cites·16 claims
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