Ping-Sun R. Cheung

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Spring, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Expanding additive for cement composition
- Patent number 5,942,031
- Issue date Aug 24, 1999
- Nalco/Exxon Energy Chemicals, L.P.
- Ping-Sun Cheung
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Fluid loss additives for cementing compositions
- Patent number 5,217,531
- Issue date Jun 8, 1993
- The Western Company of North America
- Ping-Sun R. Cheung
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES