Assignee
LEOPOLD CO INC F B
US·12 granted patents·579 citations·filing 1991–2005
Top patents by PatentIndex Score
12 records- 0190US6890431B1Buoyant media flotationLEOPOLD CO INC F B·Filed 2000·Granted May 10, 2005·68 cites·12 claims
- 0286US5108627AFilter underdrain blockLEOPOLD CO INC F B·Filed 1991·Granted Apr 28, 1992·79 cites·17 claims
- 0384US6306310B1Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in filter underdrain flumesLEOPOLD CO INC F B·Filed 2000·Granted Oct 23, 2001·36 cites·19 claims
- 0484US5160614AAir duct block for air/water underdrain systems in gravity filtersLEOPOLD CO INC F B·Filed 1992·Granted Nov 3, 1992·62 cites·15 claims
- 0582US5149427ACap for underdrains in gravity filtersLEOPOLD CO INC F B·Filed 1991·Granted Sep 22, 1992·62 cites·20 claims
- 0681US5269920ACap system for underdrains in gravity filtersLEOPOLD CO INC F B·Filed 1992·Granted Dec 14, 1993·60 cites·18 claims
- 0780US5489388AApparatus and method for improving gas backwash in lateral underdrainsLEOPOLD CO INC F B·Filed 1994·Granted Feb 6, 1996·48 cites·22 claims
- 0879US5087362AFlume distribution system with removable blockLEOPOLD CO INC F B·Filed 1991·Granted Feb 11, 1992·50 cites·20 claims
- 0976US5328608AMutli-lateral filter underdrain blockLEOPOLD CO INC F B·Filed 1992·Granted Jul 12, 1994·46 cites·14 claims
- 1075US5232592ACap for underdrains in gravity filtersLEOPOLD CO INC F B·Filed 1992·Granted Aug 3, 1993·46 cites·3 claims
- 1174US7037432B2Buoyant media flotationLEOPOLD CO INC F B·Filed 2005·Granted May 2, 2006·6 cites·7 claims
- 1247US6312611B1Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in filter underdrain flumesLEOPOLD CO INC F B·Filed 1998·Granted Nov 6, 2001·16 cites·32 claims
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