Harold B. Caldwell

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Sarasota, FL, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for manufacturing phosphoric acid
- Patent number 4,065,266
- Issue date Dec 27, 1977
- Whiting Corporation
- Harold B. Caldwell
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process and apparatus for manufacturing phosphoric acid
- Patent number 3,939,248
- Issue date Feb 17, 1976
- Whiting Corporation
- Harold B. Caldwell
- C01 - INORGANIC CHEMISTRY