Inventor · disambiguated record
David H. Duncan
Also filed as: DUNCAN DAVID H
4 granted patents·29 citations·filing 1993–1997
74Inventor score
Files withDAKOTA GASIFICATION CO4
Top patents by PatentIndex Score
4 records- 0158US5679223AMethod for separating and purifying catechol mixturesDAKOTA GASIFICATION CO·Filed 1995·Granted Oct 21, 1997·9 cites·16 claims
- 0254US5354429ANatural cresylic acid processingDAKOTA GASIFICATION CO·Filed 1993·Granted Oct 11, 1994·7 cites·6 claims
- 0351US5750009AMethod for purifying natural cresylic acid mixturesDAKOTA GASIFICATION CO·Filed 1996·Granted May 12, 1998·6 cites·5 claims
- 0431US5964987ANeutral oil removal from natural cresylic acid mixturesDAKOTA GASIFICATION CO·Filed 1997·Granted Oct 12, 1999·7 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →