Richard B. Nielsen

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Irvine, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Perlite filler
- Patent number 4,255,489
- Issue date Mar 10, 1981
- Grefco, Inc.
- Richard B. Nielsen
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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
Perlite filler coated with polydimethylsiloxane
- Patent number 4,183,980
- Issue date Jan 15, 1980
- Grefco, Inc.
- Richard B. Nielsen
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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
Information Patent Grant
Process for agglomerating expanded perlite fines
- Patent number 4,064,071
- Issue date Dec 20, 1977
- General Refractories Company
- John B. Gilmour
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method and apparatus for drying damp powder
- Patent number 4,057,908
- Issue date Nov 15, 1977
- Grefco, Inc.
- Melvin J. Mirliss
- F26 - DRYING