Stephen J. Pietsch

Person

Oak Park, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method for purifying a crude naphthalene dicarboxylic acid
- Patent number 4,933,491
- Issue date Jun 12, 1990
- Amoco Corporation
- Rusins Albertins
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Continuous process for production of methacrylic acid ester of C.su...
- Patent number 4,748,268
- Issue date May 31, 1988
- Amoco Corporation
- Stephen J. Pietsch
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Membrane separation of catalyst metals from trimellitic acid produc...
- Patent number 4,311,521
- Issue date Jan 19, 1982
- Standard Oil Company (Indiana)
- Jon J. Harper
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Separation of cobalt and manganese from trimellitic acid process re...
- Patent number 4,309,390
- Issue date Jan 5, 1982
- Standard Oil Company (Indiana)
- Jon J. Harper
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Recovery of cobalt and manganese from ash of residue from manufactu...
- Patent number 4,308,240
- Issue date Dec 29, 1981
- Standard Oil Company (Indiana)
- Jon J. Harper
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Separation of cobalt and manganese from trimellitic acid process re...
- Patent number 4,298,759
- Issue date Nov 3, 1981
- Standard Oil Company (Indiana)
- Jon J. Harper
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Separation of cobalt and manganese from trimellitic acid process re...
- Patent number 4,298,580
- Issue date Nov 3, 1981
- Standard Oil Company (Indiana)
- Jon J. Harper
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Stephen J. Pietsch

Person

Patents Grantslast 30 patents

Method for purifying a crude naphthalene dicarboxylic acid

Continuous process for production of methacrylic acid ester of C.su...

Membrane separation of catalyst metals from trimellitic acid produc...

Separation of cobalt and manganese from trimellitic acid process re...

Recovery of cobalt and manganese from ash of residue from manufactu...

Separation of cobalt and manganese from trimellitic acid process re...

Separation of cobalt and manganese from trimellitic acid process re...