Mark J. Ziegler

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Rockford, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making proppants used in gas or oil extraction
- Patent number 8,464,969
- Issue date Jun 18, 2013
- Unimin Corporation
- Mark J. Ziegler
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method of making proppants used in gas or oil extraction
- Patent number 8,235,313
- Issue date Aug 7, 2012
- Unimin Corporation
- Mark J. Ziegler
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF MAKING PROPPANTS USED IN GAS OR OIL EXTRACTION
- Publication number 20110290917
- Publication date Dec 1, 2011
- UNIMIN CORPORATION
- Mark J. Ziegler
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHOD OF MAKING PROPPANTS USED IN GAS OR OIL EXTRACTION
- Publication number 20100071902
- Publication date Mar 25, 2010
- Unimin Corporation
- Mark J. Ziegler
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES