Inventor · disambiguated record

Dennis J. Simpkin

Also filed as: SIMPKIN DENNIS J · SIMPKIN DENNIS JOHN

3 granted patents·20 citations·filing 1983–1998

68Inventor score

Technology areasC10M C07G

Files withEXXON CHEMICAL PATENTS INC2 EXXON RESEARCH ENGINEERING CO1

Top patents by PatentIndex Score

3 records

0148US4557872ABasic alkaline earth metal sulphonatesEXXON RESEARCH ENGINEERING CO·Filed 1983·Granted Dec 10, 1985·6 cites·7 claims
0241US6245724B1Preparation of sulfurized phenol additives intermediates and compositionsEXXON CHEMICAL PATENTS INC·Filed 1998·Granted Jun 12, 2001·7 cites·51 claims
0341US5827806APreparation of sulfurized phenol additives intermediates and compositionsEXXON CHEMICAL PATENTS INC·Filed 1995·Granted Oct 27, 1998·7 cites·22 claims

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