Inventor
HARTLEY ROLFE J
US31 patents
⚠️ This page may combine multiple inventors who share the name “HARTLEY ROLFE J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
INFINEUM INT LTD
8 patentsUS6723685B2Apr 20, 2004
Lubricating oil composition
INFINEUM INT LTD219 citations99
US7485603B2Feb 3, 2009
Soot dispersants and lubricating oil compositions containing same
INFINEUM INT LTD99 citations96
US6333298B1Dec 25, 2001
Molybdenum-free low volatility lubricating oil composition
INFINEUM INT LTD59 citations95
US6642188B1Nov 4, 2003
Lubricating oil composition for outboard engines
INFINEUM INT LTD28 citations92
US6500786B1Dec 31, 2002
Lubricating oil composition
INFINEUM INT LTD47 citations92
US7022653B2Apr 4, 2006
Friction modifiers for engine oil composition
INFINEUM INT LTD23 citations91
US6852679B2Feb 8, 2005
Lubricating oil composition
INFINEUM INT LTD27 citations91
US6358896B1Mar 19, 2002
Friction modifiers for engine oil composition
INFINEUM INT LTD7 citations74
ETHYL PETROLEUM ADDITIVES INC
8 patentsUS5652201AJul 29, 1997
Lubricating oil compositions and concentrates and the use thereof
ETHYL PETROLEUM ADDITIVES INC239 citations99
US4857214AAug 15, 1989
Oil-soluble phosphorus antiwear additives for lubricants
ETHYL PETROLEUM ADDITIVES INC268 citations99
US5344579ASep 6, 1994
Friction modifier compositions and their use
ETHYL PETROLEUM ADDITIVES INC65 citations94
US5089156AFeb 18, 1992
Ashless or low-ash synthetic base compositions and additives therefor
ETHYL PETROLEUM ADDITIVES INC73 citations94
US5441656AAug 15, 1995
Automatic transmission fluids and additives therefor
ETHYL PETROLEUM ADDITIVES INC49 citations91
US5372735ADec 13, 1994
Automatic transmission fluids and additives therefor
ETHYL PETROLEUM ADDITIVES INC52 citations91
US5387346AFeb 7, 1995
Automatic transmission fluids and additives therefor
ETHYL PETROLEUM ADDITIVES INC20 citations90
US5360562ANov 1, 1994
Ashless or low-ash synthetic base compositions and additives therefor
ETHYL PETROLEUM ADDITIVES INC29 citations90
ETHYL CORP
6 patentsUS5571445ANov 5, 1996
Gear oil compositions
ETHYL CORP54 citations96
US5358650AOct 25, 1994
Gear oil compositions
ETHYL CORP63 citations96
US6096691AAug 1, 2000
Gear oil additive concentrates and lubricants containing them
ETHYL CORP60 citations94
US5573696ANov 12, 1996
Oil-soluble phosphorus- and nitrogen-containing additives
ETHYL CORP21 citations90
US5500140AMar 19, 1996
Oil-soluble phosphorus- and nitrogen-containing additives
ETHYL CORP23 citations90
US5612295AMar 18, 1997
Lubricant additive compositions
ETHYL CORP15 citations74
EXXON CHEMICAL PATENTS INC
4 patentsUS5880075AMar 9, 1999
Synthetic biodegradable lubricants and functional fluids
EXXON CHEMICAL PATENTS INC28 citations91
US5962378AOct 5, 1999
Synergistic combinations for use in functional fluid compositions
EXXON CHEMICAL PATENTS INC34 citations89
US6054420AApr 25, 2000
Synthetic biodegradable lubricants and functional fluids
EXXON CHEMICAL PATENTS INC14 citations72
US6498129B1Dec 24, 2002
Two-cycle lubricating oil containing polyisobutylene amine
EXXON CHEMICAL PATENTS INC5 citations60