Inventor · disambiguated record
Richard Donald Witham
Also filed as: WITHAM RICHARD D · WITHAM RICHARD DONALD
7 granted patents·4 pending applications·108 citations·filing 2003–2013
87Inventor score
Top patents by PatentIndex Score
11 records- 0193US7338603B1Process using rare earths to remove oxyanions from aqueous streamsMOLYCORP INC·Filed 2005·Granted Mar 4, 2008·29 cites·33 claims
- 0291US7048853B2Process for removing arsenic from drinking waterUNION OIL CO·Filed 2005·Granted May 23, 2006·15 cites·11 claims
- 0390US7300589B2Process for removing arsenic from aqueous streamsUNION OIL CO·Filed 2006·Granted Nov 27, 2007·12 cites·4 claims
- 0484US7686976B2Composition for removing arsenic from aqueous streamsMOLYCORP MINERALS LLC·Filed 2007·Granted Mar 30, 2010·8 cites·32 claims
- 0583US6863825B2Process for removing arsenic from aqueous streamsUNION OIL CO·Filed 2003·Granted Mar 8, 2005·36 cites·42 claims
- 0674US8475658B2Water purification device for arsenic removalWITHAM RICHARD DONALD·Filed 2009·Granted Jul 2, 2013·4 cites·59 claims
- 0773US8425871B2Single phase yttrium phosphate having the xenotime crystal structure and method for its synthesisGRAY SANDRA LEE·Filed 2007·Granted Apr 23, 2013·4 cites·16 claims
- 0856US2009107919A1Apparatus and process for treating an aqueous solution containing chemical contaminantsCHEVRON USA INC·Filed 2007·Application pending·0 cites
- 0952US2010187178A1Process for removing and sequestering contaminants from aqueous streamsMOLYCORP MINERALS LLC·Filed 2009·Application pending·0 cites
- 1052US2014011662A1Single phase yttrium phosphate having the xenotime crystal structure and method for its synthesisCORNING INC·Filed 2013·Application pending·0 cites
- 1147US2010168498A1Apparatus and process for treating an aqueous solution containing chemical contaminantsMOLYCORP MINERALS LLC·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →