Inventor · disambiguated record
John P. Longwell
Also filed as: LONGWELL JOHN P
5 granted patents·171 citations·filing 1975–1980
83Inventor score
Top patents by PatentIndex Score
5 records- 0191US3993457AConcurrent production of methanol and synthetic natural gasEXXON RESEARCH ENGINEERING CO·Filed 1975·Granted Nov 23, 1976·65 cites·21 claims
- 0288US4058575ACatalyst pretreatment with hydrocarbon feedstockEXXON RESEARCH ENGINEERING CO·Filed 1975·Granted Nov 15, 1977·48 cites·13 claims
- 0376US4343606AMulti-stage process for combusting fuels containing fixed-nitrogen chemical speciesEXXON RESEARCH ENGINEERING CO·Filed 1980·Granted Aug 10, 1982·30 cites·17 claims
- 0458US4388062AMulti-stage process for combusting fuels containing fixed-nitrogen speciesEXXON RESEARCH ENGINEERING CO·Filed 1980·Granted Jun 14, 1983·19 cites·14 claims
- 0547US4409094AProcess for detoxifying coal tarsMASSACHUSETTS INST TECHNOLOGY·Filed 1980·Granted Oct 11, 1983·9 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →