Charles J. Vogelsang

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Cerritos, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Diatomaceous earth filteraid and method for its manufacture
- Patent number 4,187,174
- Issue date Feb 5, 1980
- Grefco, Inc.
- Richard B. Nielsen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Diatomaceous earth filteraid and method for its manufacture
- Patent number 4,142,968
- Issue date Mar 6, 1979
- Grefco, Inc.
- Richard B. Nielsen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL