Duane J. Lewis

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Austin, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for growing crystals
- Patent number 5,569,325
- Issue date Oct 29, 1996
- Condea Vista Company
- David A. Barclay
- C30 - CRYSTAL GROWTH
Information Patent Grant
Process for preparing mixed oxides
- Patent number 5,316,752
- Issue date May 31, 1994
- Vista Chemical Company
- Ronald L. Beggs
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process for preparing small particle size mixed metal oxides
- Patent number 5,075,090
- Issue date Dec 24, 1991
- Vista Chemical Company
- Duane J. Lewis
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for production of alumina
- Patent number 4,744,974
- Issue date May 17, 1988
- Vista Chemical Company
- Duane J. Lewis
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Production and recovery of alumina from vapor phase hydrolysis of a...
- Patent number 4,617,183
- Issue date Oct 14, 1986
- Vista Chemical Company
- Duane J. Lewis
- C01 - INORGANIC CHEMISTRY