Inventor · disambiguated record
Harold W. Helmke
Also filed as: HELMKE HAROLD W · HELMKE HAROLD WILLIAM · HELMKE JR HAROLD W
5 granted patents·189 citations·filing 1990–2008
84Inventor score
Top patents by PatentIndex Score
5 records- 0195US7439412B2Process for producing para-xyleneEXXONMOBIL CHEM PATENTS INC·Filed 2007·Granted Oct 21, 2008·21 cites·38 claims
- 0293US7626065B2Process for producing para-xyleneEXXONMOBIL CHEM PATENTS INC·Filed 2008·Granted Dec 1, 2009·14 cites·20 claims
- 0393US5215649AMethod for upgrading steam cracker tarsEXXON CHEMICAL PATENTS INC·Filed 1990·Granted Jun 1, 1993·74 cites·38 claims
- 0487US6489527B1Process for improving purity of para-xylene productFiled 1995·Granted Dec 3, 2002·40 cites·35 claims
- 0583US5443715AMethod for upgrading steam cracker tarsEXXON CHEMICAL PATENTS INC·Filed 1993·Granted Aug 22, 1995·40 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →