Inventor
RYAN DOUGLAS G
US16 patents
⚠️ This page may combine multiple inventors who share the name “RYAN DOUGLAS G”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
EXXON RESEARCH ENGINEERING CO
15 patentsUS4512878AApr 23, 1985
Used oil re-refining
EXXON RESEARCH ENGINEERING CO102 citations94
US3975396AAug 17, 1976
Deasphalting process
EXXON RESEARCH ENGINEERING CO34 citations92
US4346008AAug 24, 1982
Rotary drum filter
EXXON RESEARCH ENGINEERING CO32 citations91
US4622118ANov 11, 1986
Method and apparatus for separating wax/water from hydrocarbon oil mixture boiling in the lubricating oil range
EXXON RESEARCH ENGINEERING CO19 citations81
US4581112AApr 8, 1986
Method and apparatus for separating wax/water from hydrocarbon mixture boiling in the lubricating oil range
EXXON RESEARCH ENGINEERING CO23 citations80
US4622119ANov 11, 1986
Method of promoting nucleation of solute in a solution
EXXON RESEARCH ENGINEERING CO19 citations78
US4627901ADec 9, 1986
Separating wax from hydrocarbon mixture boiling in the lubricating oil range
EXXON RESEARCH ENGINEERING CO15 citations73
US4820400AApr 11, 1989
Process for removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range (OP-3379)
EXXON RESEARCH ENGINEERING CO10 citations67
US4309288AJan 5, 1982
Rotary drum filter
EXXON RESEARCH ENGINEERING CO9 citations66
US4629546ADec 16, 1986
Method and apparatus for centrifugal separation of dispersed phase from a continuous liquid phase
EXXON RESEARCH ENGINEERING CO2 citations62
US4314886AFeb 9, 1982
Mechanically agitated liquid-vapor contacting apparatus
EXXON RESEARCH ENGINEERING CO3 citations62
US4702817AOct 27, 1987
Removing haze from hydrocarbon oil mixture boiling in the lubricating oil range
EXXON RESEARCH ENGINEERING CO5 citations59
US4904367AFeb 27, 1990
Removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range
EXXON RESEARCH ENGINEERING CO3 citations58
US4490240ADec 25, 1984
Removal of corrodants from NMP solvent by contacting with sacrificial metal
EXXON RESEARCH ENGINEERING CO3 citations56
US4217203AAug 12, 1980
Continuous autorefrigerative dewaxing process and apparatus
EXXON RESEARCH ENGINEERING CO1 citations51