Inventor · disambiguated record
David J. Derwin
Also filed as: DERWIN DAVID J
8 granted patents·1 pending application·295 citations·filing 1995–2013
88Inventor score
Top patents by PatentIndex Score
9 records- 0192US5826669ADrilling fluid loss prevention and lubrication additiveSUPERIOR GRAPHITE CO·Filed 1996·Granted Oct 27, 1998·158 cites·23 claims
- 0287US8617309B1Cement compositions including resilient graphitic carbon fractionSUPERIOR GRAPHITE CO·Filed 2013·Granted Dec 31, 2013·14 cites·11 claims
- 0385US6287694B1Method for expanding lamellar forms of graphite and resultant productSUPERIOR GRAPHITE CO·Filed 1999·Granted Sep 11, 2001·90 cites·20 claims
- 0471US8999898B2Drilling fluid additive for loss circulation and wellbore strengtheningSUPERIOR GRAPHITE CO·Filed 2013·Granted Apr 7, 2015·2 cites·1 claims
- 0554US6971819B2Electrically conductive pavement mixtureSUPERIOR GRAPHITE CO·Filed 2001·Granted Dec 6, 2005·6 cites·5 claims
- 0654US5707171AElectrically conductive paving mixture and pavement systemFiled 1995·Granted Jan 13, 1998·21 cites·13 claims
- 0751US6660434B2Engineered carbonaceous materials and power sources using these materialsSUPERIOR GRAPHITE CO·Filed 2001·Granted Dec 9, 2003·2 cites·12 claims
- 0842USRE43044EElectrically conductive pavement mixtureZALESKI PETER L·Filed 2001·Granted Dec 27, 2011·2 cites·5 claims
- 0939US2004048162A1Engineered carbonaceous materials and power sources using these materialsFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →