DH

David A. Hutchison

AC Afton Chemical: 5 patents #38 of 222Top 20%
AM Amoco: 2 patents #385 of 1,251Top 35%
AR Atlantic Richfield: 2 patents #271 of 1,061Top 30%
OR Orion: 2 patents #11 of 40Top 30%
EA Ethyl Petroleum Additives: 1 patents #37 of 68Top 55%
📍 Hammond, IN: #10 of 261 inventorsTop 4%
🗺 Indiana: #2,973 of 33,936 inventorsTop 9%
Overall (All Time): #421,046 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
8623105 Fuel additives to maintain optimum injector performance Dennis J. Malfer, Joshua J. Bennett, Jason Lagona 2014-01-07
8377856 Extended drain diesel lubricant formulations Cathy C. Devlin 2013-02-19
7863228 Additives for lubricants and fuels John T. Loper, Paul G. Griffin, Robert T. Dittmeier 2011-01-04
7833954 Lubricating composition 2010-11-16
7361629 Additives for lubricants and fuels John T. Loper, Paul G. Griffin, Robert T. Dittmeier 2008-04-22
5174915 Medium speed diesel engine lubricating oils Richard D. Stauffer 1992-12-29
D320604 Cover for an antenna base James Hadzoglou 1991-10-08
D314576 Combined base and cover for an antenna James Hadzoglou 1991-02-12
4948523 Chlorine-free silver protective lubricant composition (I) Lionel D. Moore 1990-08-14
4871465 Chlorine-free silver protective lubricant composition (II) 1989-10-03
4498998 Stabilization of hydrocracked oils against UV-light degradation with certain dihydroxy components 1985-02-12
4427563 Stabilization of hydrocracked oils with certain dihydroxy diphenyl oxidation stabilizers 1984-01-24