Inventor

CHA CHANG Y

42 patents

⚠️ This page may combine multiple inventors who share the name “CHA CHANG Y”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHA CHANG Y

OCCIDENTAL OIL SHALE INC

Two-stage removal of sulfur dioxide from process gas using treated oil shale

Reduction of shale oil pour point

Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature

Determining the locus of a processing zone in an oil shale retort by effluent water composition

In situ oil shale retort with variations in surface area corresponding to kerogen content of formation within retort site

Determining the locus of a processing zone in an in situ oil shale retort

Method for operating an in situ oil shale retort having channelling

In situ retorting with high temperature oxygen supplying gas

Method of enhancing yield from an in situ oil shale retort

Method for assuring uniform combustion in an in situ oil shale retort

Operation of in situ oil shale retort with void at the top

Locating the top of an in situ oil shale retort for ease of ignition

Method for flattening the combustion zone in an in situ oil shale retort by the addition of fuel

Process for recovering carbonaceous values from in situ oil shale retorting

Determining the locus of a processing zone in an oil shale retort by off gas composition

Decreasing hydrocarbon, hydrogen and carbon monoxide concentration of a gas

Method for establishing a combustion zone in an in situ oil shale retort

Two-level, horizontal free face mining system for in situ oil shale retorts

Ignition technique for an in situ oil shale retort

Method for igniting an in situ oil shale retort

Determining the locus of a processing zone in an oil shale retort by effluent off gas heating value

Determining the locus of a processing zone in an oil shale retort by monitoring pressure drop across the retort

Operation of an in situ oil shale retort

Determining the locus of a retorting zone in an oil shale retort by rate of shale oil production

Method for forming an in situ oil shale retort

CHA CHANG Y

Process for selected gas oxide removal by radiofrequency catalysts

Low-cost process for hydrogen production

Process and reactor for char-gas oxide reactions by radiofrequency catalysis

Process and reactor for char-gas oxide reactions by radiofrequency catalysis

Process for oxide reactions by radiofrequency-char catalysis

Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top

WESTERN RESEARCH INST

Inclined fluidized bed system for drying fine coal

Process for removing heavy metal compounds from heavy crude oil

Fluidized bed selective pyrolysis of coal

Low-cost process for hydrogen production

UNIV WYOMING

Process for co-recycling tires and oils

Process for co-recycling tires and oils

CHANG YUL CHA

Pollution arrestor

WESTERN RESEARCH INST & ILR SE

Pyrolysis methods with product oil recycling

(unassigned)

Process for microwave catalysis of chemical reactions using waveguide liquid films

RECH PARTICIP MINIERES

Processes of pyrolysis and treatment of pyrolysis residues

SCIENCE APPLIC INTERNATIONAL

Secondary oil shale recovery technique