Yuehsiung Chang

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Naperville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing sulfurized alkylphenols
- Patent number 4,873,007
- Issue date Oct 10, 1989
- Amoco Corporation
- Yuehsiung Chang
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Lubricant overbased phenate detergent with improved water tolerance
- Patent number 4,865,754
- Issue date Sep 12, 1989
- Amoco Corporation
- Yuehsiung Chang
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Aqueous recovery of cobalt or cobalt and manganese from solution al...
- Patent number 4,680,098
- Issue date Jul 14, 1987
- Amoco Corporation
- Yuehsiung Chang
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Phenate product and process
- Patent number 4,664,824
- Issue date May 12, 1987
- Amoco Corporation
- Yuehsiung Chang
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Phenate process and composition improvement
- Patent number 4,608,184
- Issue date Aug 26, 1986
- Amoco Corporation
- Yuehsiung Chang
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Regeneration of alkaline treating agents
- Patent number 4,519,881
- Issue date May 28, 1985
- Standard Oil Company (Indiana)
- Yuehsiung Chang
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR