Gypsum product |
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| 申请号 | US33462263 | 申请日 | 1963-12-30 | 公开(公告)号 | US3328121A | 公开(公告)日 | 1967-06-27 |
| 申请人 | NAT GYPSUM CO; | 发明人 | SHULL JR JOHN D; | ||||
| 摘要 | |||||||
| 权利要求 | 1. A GYPSUM PLASTER CAPABLE WHEN MIXED WITH WATER OF PROVIDING IMPROVED SOAKABILITY AND WORKABILITY COMPRISING TUBE MILLED GYPSUM HEMIHYDRATE HAVING A SURFACE AREA OF AT LEAST 9,000 SQUARE CENTIMETERS PER GRAM WHICH HAS SUBSEQUENTLY BEEN IMPACT MILLED TO PROVIDE AN INCREASE IN SURFACE AREA OF AT LEAST 100 SQUARE CENTIMETERS PER GRAM. |
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| 说明书全文 | |||||||
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