Inventor · disambiguated record
William T. Welch
Also filed as: WELCH WILLIAM T
12 granted patents·1 pending application·819 citations·filing 1974–2007
94Inventor score
Files withASHLAND INC5ASHLAND OIL INC3MARATHON ASHLAND PETROLEUM LLC2MARATHON ASHLAND PETROLEUM1MARATHON PETROLEUM COMPANY LLC1
Top patents by PatentIndex Score
13 records- 0195US7404411B2Method and apparatus for analysis of relative levels of biodiesel in fuels by near-infrared spectroscopyMARATHON ASHLAND PETROLEUM LLC·Filed 2005·Granted Jul 29, 2008·40 cites·23 claims
- 0291US5145785ADetermination of aromatics in hydrocarbons by near infrared spectroscopy and calibration thereforASHLAND OIL INC·Filed 1990·Granted Sep 8, 1992·81 cites·17 claims
- 0390US6087662AProcess for analysis of asphaltene content in hydrocarbon mixtures by middle infrared spectroscopyMARATHON ASHLAND PETROLEUM LLC·Filed 1998·Granted Jul 11, 2000·104 cites·19 claims
- 0488US5712481AProcess and apparatus for analysis of hydrocarbon species by near infrared spectroscopyASHLAND INC·Filed 1996·Granted Jan 27, 1998·98 cites·18 claims
- 0588US5684580AHydrocarbon analysis and control by raman spectroscopyASHLAND INC·Filed 1995·Granted Nov 4, 1997·109 cites·66 claims
- 0686US5348645ADetermination of aromatics in hydrocarbons by near infrared spectroscopyASHLAND OIL INC·Filed 1992·Granted Sep 20, 1994·58 cites·36 claims
- 0783US5370790ADetermination of aromatics in hydrocarbons by near infrared spectroscopyASHLAND OIL INC·Filed 1992·Granted Dec 6, 1994·47 cites·16 claims
- 0882US5892228AProcess and apparatus for octane numbers and reid vapor pressure by Raman spectroscopyASHLAND INC·Filed 1996·Granted Apr 6, 1999·68 cites·46 claims
- 0981US5596196AOxygenate analysis and control by Raman spectroscopyASHLAND INC·Filed 1995·Granted Jan 21, 1997·67 cites·39 claims
- 1080US6140647AGasoline RFG analysis by a spectrometerMARATHON ASHLAND PETROLEUM·Filed 1997·Granted Oct 31, 2000·67 cites·46 claims
- 1178US5856869ADistributed bragg reflector diode laser for Raman excitation and method for useASHLAND INC·Filed 1996·Granted Jan 5, 1999·55 cites·15 claims
- 1268US4020612ALintel structureSMITH PIPE AND STEEL CO·Filed 1974·Granted May 3, 1977·25 cites·8 claims
- 1344US2007212790A1Method for monitoring feeds to catalytic cracking units by near-infrared spectroscopyMARATHON PETROLEUM COMPANY LLC·Filed 2007·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →