Otto C. Jahnke

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El Cajon, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Internal boundary layer ceramic compositions
- Patent number 4,337,162
- Issue date Jun 29, 1982
- University of Illinois Foundation
- David A. Payne
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Reduced alkaline earth metal powders and process for producing same
- Patent number 4,284,521
- Issue date Aug 18, 1981
- Ferro Corporation
- David A. Payne
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method of producing internal boundary layer ceramic compositions
- Patent number 4,237,084
- Issue date Dec 2, 1980
- University of Illinois Foundation
- David A. Payne
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES