Assignee
GRAVER CO
US·37 granted patents·1,038 citations·filing 1983–1996
Top patents by PatentIndex Score
37 records- 0194US4747955APurification of liquids with treated polyester fibersGRAVER CO·Filed 1987·Granted May 31, 1988·86 cites·30 claims
- 0289US5643968AProcess for producing ion exchange membranes, and the ion exchange membranes produced therebyGRAVER CO·Filed 1994·Granted Jul 1, 1997·87 cites·15 claims
- 0385US4889624ALamella gravity separatorGRAVER CO·Filed 1989·Granted Dec 26, 1989·79 cites·14 claims
- 0485US4880513AMethod and apparatus for generating acid and base regenerants and the use thereof to regenerate ion-exchange resinsGRAVER CO·Filed 1986·Granted Nov 14, 1989·57 cites·73 claims
- 0583US5346624AMethod and apparatus for treatment of aqueous solutionsGRAVER CO·Filed 1993·Granted Sep 13, 1994·59 cites·35 claims
- 0680US5601704AAutomatic feedback control system for a water treatment apparatusGRAVER CO·Filed 1994·Granted Feb 11, 1997·60 cites·17 claims
- 0780US5114596ABackwash method and apparatusGRAVER CO·Filed 1990·Granted May 19, 1992·60 cites·9 claims
- 0879US5192446ACation exchange resins having an enhanced capacity for iron oxidesGRAVER CO·Filed 1992·Granted Mar 9, 1993·34 cites·15 claims
- 0978US5376278AFilter and a method for separating charged particles from a liquid streamGRAVER CO·Filed 1993·Granted Dec 27, 1994·38 cites·21 claims
- 1078US5017241ABackwash method and apparatusGRAVER CO·Filed 1990·Granted May 21, 1991·53 cites·6 claims
- 1178US4707257AAir/water distributor underdrainGRAVER CO·Filed 1986·Granted Nov 17, 1987·44 cites·25 claims
- 1276US5049233ARecovery of sodium hydroxide and aluminum hydroxide from etching wasteGRAVER CO·Filed 1990·Granted Sep 17, 1991·27 cites·23 claims
- 1369US4683025AMethod and apparatus to convert a long tube vertical evaporator to a falling film evaporatorGRAVER CO·Filed 1986·Granted Jul 28, 1987·45 cites·10 claims
- 1468US4609462AMethod and apparatus to convert top tube sheet filter to bottom tube sheet filterGRAVER CO·Filed 1985·Granted Sep 2, 1986·34 cites·25 claims
- 1568US4564455AThree component resin system and method for purifying aqueous solutionsGRAVER CO·Filed 1983·Granted Jan 14, 1986·20 cites·18 claims
- 1666US5207905ABaffle assembly for air and water backwash of a media filterGRAVER CO·Filed 1992·Granted May 4, 1993·29 cites·7 claims
- 1760US5250159ABipolar membrane stack and method for producing acid and monovalent base from impure saltGRAVER CO·Filed 1991·Granted Oct 5, 1993·24 cites·7 claims
- 1859US4629571ADeoxygenation and purification of liquidsGRAVER CO·Filed 1985·Granted Dec 16, 1986·21 cites·44 claims
- 1957US5397477AIon exchange resin having dual morphologyGRAVER CO·Filed 1993·Granted Mar 14, 1995·13 cites·28 claims
- 2055US5667679AFilter having a filter element quick-disconnect mountGRAVER CO·Filed 1996·Granted Sep 16, 1997·29 cites·7 claims
- 2154US5403492AIon exchange resin having dual morphologyGRAVER CO·Filed 1993·Granted Apr 4, 1995·14 cites·34 claims
- 2253US4572742APrecoat filter and method for neutralizing sugar syrupsGRAVER CO·Filed 1983·Granted Feb 25, 1986·14 cites·14 claims
- 2351US5028322ALow profile underdrain strainer assembly with improved distribution/fastening meansGRAVER CO·Filed 1989·Granted Jul 2, 1991·17 cites·9 claims
- 2451US4568466AMethod for pretreating aqueous solutions with weakly acidic cation exchange resinsGRAVER CO·Filed 1983·Granted Feb 4, 1986·9 cites·36 claims
- 2550US5207879ABipolar membrane stack and method for production of low chloride sodium hydroxideGRAVER CO·Filed 1991·Granted May 4, 1993·8 cites·11 claims
- 2646US5624965AArylenedialkylidene polymers for high performance ion exchange membranesGRAVER CO·Filed 1994·Granted Apr 29, 1997·9 cites·12 claims
- 2743US5126052ACondensate polishing system incorporating a membrane filterGRAVER CO·Filed 1991·Granted Jun 30, 1992·10 cites·28 claims
- 2842US5552056AFilter element having an ion exchange yarn winding layerGRAVER CO·Filed 1995·Granted Sep 3, 1996·11 cites·14 claims
- 2938US5212205ARegeneration of deep bed condensate polishersGRAVER CO·Filed 1992·Granted May 18, 1993·5 cites·13 claims
- 3038US4548717AMethod for treating aqueous solutions with weakly acidic cation exchange resinsGRAVER CO·Filed 1983·Granted Oct 22, 1985·4 cites·35 claims
- 3138US4547291AMethod for treating aqueous solutions with weakly acidic cation exchange resinsGRAVER CO·Filed 1983·Granted Oct 15, 1985·4 cites·35 claims
- 3236US4663051ARegeneration of mixed bed demineralizersGRAVER CO·Filed 1985·Granted May 5, 1987·9 cites·17 claims
- 3334US5196122AExternal regeneration system for mixed bed ion exchangersGRAVER CO·Filed 1992·Granted Mar 23, 1993·3 cites·12 claims
- 3434US5022997AMethod for treating aqueous solutionsGRAVER CO·Filed 1989·Granted Jun 11, 1991·4 cites·26 claims
- 3532US4622141AMethod and apparatus for withdrawing a layer of material from a vesselGRAVER CO·Filed 1984·Granted Nov 11, 1986·7 cites·14 claims
- 3631US4863498ADeaerator unitGRAVER CO·Filed 1988·Granted Sep 5, 1989·5 cites·6 claims
- 3719US4663054AHot process liquid treatment method and apparatusGRAVER CO·Filed 1986·Granted May 5, 1987·6 cites·15 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →