Inventor
WELCH WILLIAM T
US12 patents
⚠️ This page may combine multiple inventors who share the name “WELCH WILLIAM T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASHLAND INC
5 patentsUS5712481AJan 27, 1998
Process and apparatus for analysis of hydrocarbon species by near infrared spectroscopy
ASHLAND INC98 citations95
US5892228AApr 6, 1999
Process and apparatus for octane numbers and reid vapor pressure by Raman spectroscopy
ASHLAND INC68 citations94
US5684580ANov 4, 1997
Hydrocarbon analysis and control by raman spectroscopy
ASHLAND INC109 citations94
US5596196AJan 21, 1997
Oxygenate analysis and control by Raman spectroscopy
ASHLAND INC67 citations94
US5856869AJan 5, 1999
Distributed bragg reflector diode laser for Raman excitation and method for use
ASHLAND INC55 citations92
ASHLAND OIL INC
3 patentsUS5370790ADec 6, 1994
Determination of aromatics in hydrocarbons by near infrared spectroscopy
ASHLAND OIL INC47 citations95
US5348645ASep 20, 1994
Determination of aromatics in hydrocarbons by near infrared spectroscopy
ASHLAND OIL INC58 citations95
US5145785ASep 8, 1992
Determination of aromatics in hydrocarbons by near infrared spectroscopy and calibration therefor
ASHLAND OIL INC81 citations95
MARATHON ASHLAND PETROLEUM LLC
2 patentsUS6087662AJul 11, 2000
Process for analysis of asphaltene content in hydrocarbon mixtures by middle infrared spectroscopy
MARATHON ASHLAND PETROLEUM LLC104 citations97
US7404411B2Jul 29, 2008
Method and apparatus for analysis of relative levels of biodiesel in fuels by near-infrared spectroscopy
MARATHON ASHLAND PETROLEUM LLC40 citations90