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Patent applications and USPTO patent grants for Yue; Sing Tsze.The latest application filed is for "stannous sulfate and gypsum mixture as a retarder in grinding portland cement and blended hydraulic cement for improving the quality of the cement, mortar and concrete".
Patent | Date |
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Stannous sulfate and gypsum mixture as a retarder in grinding portland cement and blended hydraulic cement for improving the quality of the cement, mortar and concrete Grant 4,011,092 - Yue March 8, 1 | 1977-03-08 |
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