Inventor · disambiguated record
David W. Pratt
Also filed as: PRATT DAVID · PRATT DAVID W
22 granted patents·1 pending application·336 citations·filing 1980–2006
95Inventor score
Top patents by PatentIndex Score
23 records- 0195US6472341B1Polymerization catalystsBP CHEM INT LTD·Filed 2000·Granted Oct 29, 2002·49 cites·32 claims
- 0293US5996800AResealable plastic bag having venting meansFiled 1998·Granted Dec 7, 1999·121 cites·2 claims
- 0377US6543302B1Multiple check valve bailerFiled 2001·Granted Apr 8, 2003·15 cites·13 claims
- 0475US6399532B1Polymerization catalystBP CHEM INT LTD·Filed 2000·Granted Jun 4, 2002·14 cites·13 claims
- 0572US6979033B2Dual function bailerPRATT DAVID W·Filed 2005·Granted Dec 27, 2005·3 cites·5 claims
- 0670US6457760B1High speed insertion bailer having snap-in spider for valve alignmentFiled 2000·Granted Oct 1, 2002·9 cites·12 claims
- 0770US6286880B1Bailer having leak-inhibiting cushioned sealFiled 2000·Granted Sep 11, 2001·16 cites·2 claims
- 0869US6135523ABailer having leak-inhibiting sealFiled 1999·Granted Oct 24, 2000·28 cites·2 claims
- 0967US6846028B2Dual function bailerFiled 2001·Granted Jan 25, 2005·6 cites·1 claims
- 1065US6989092B1Bailer having built-in filterPRATT DAVID W·Filed 2003·Granted Jan 24, 2006·6 cites·15 claims
- 1165US6410659B1Polymerization processBP CHEM INT LTD·Filed 1997·Granted Jun 25, 2002·20 cites·11 claims
- 1263USD458341SRibbed filterFiled 2001·Granted Jun 4, 2002·13 cites·1 claims
- 1360US7255380B1Bottom-emptying device for tapered bailerPRATT DAVID W·Filed 2003·Granted Aug 14, 2007·3 cites·9 claims
- 1460US6669255B2Apparatus for inhibiting contamination of sample during bailer emptyingFiled 2002·Granted Dec 30, 2003·3 cites·5 claims
- 1555US6966587B1Self-emptying bailerPRATT DAVID W·Filed 2004·Granted Nov 22, 2005·1 cites·2 claims
- 1647US6457486B1Bailer having leak-inhibiting sealFiled 2002·Granted Oct 1, 2002·2 cites·3 claims
- 1747US6431272B1Controlled slow descent bailerFiled 2001·Granted Aug 13, 2002·10 cites·14 claims
- 1847US6390123B1Bailer having leak-inhibiting sealFiled 2001·Granted May 21, 2002·2 cites·2 claims
- 1944US2008234448A1Recovery and Washing Process for PolymersINEOS EUROPE LTD·Filed 2006·Application pending·0 cites
- 2042US6601889B2Air-tight bailer systemFiled 2001·Granted Aug 5, 2003·5 cites·14 claims
- 2135US6058790AAdjustable length sampler tubeFiled 1999·Granted May 9, 2000·4 cites·1 claims
- 2235USD267583SFireplace insertPRATT DAVID W·Filed 1980·Granted Jan 11, 1983·1 cites·1 claims
- 2331US6167962B1Anti-wobbling bailer with high speed insertionFiled 1999·Granted Jan 2, 2001·5 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →