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Hardening a cement mixture

  • US 3,305,613 A
  • Filed: 06/28/1963
  • Issued: 02/21/1967
  • Est. Priority Date: 06/28/1963
  • Status: Expired due to Term
First Claim
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1. IN A PROCESS OF MANUFACTURING A PORTLAND CEMENT PRODUCT IN WHCIH A LAYER OF A PORTLAND CEMENT MIXTURE CONTAINING WATER IS LOCATED UPON A SUPPORTING SURFACE AND IS TRANSFERRED FROM SAID SUPPORTING SUFRACE TO A FORM HAVE A SHAPE CORRESPONDING TO THE SHAPE OF SAID PRODUCT, THE IMPROVEMENT WHICH COMPRISES:

  • APPYLING CARBON DIOXIDE GAS TO SAID MIXTURE PRIOR TO THE HYDRATION OF THE CEMENT IN SAID MIXTURE AS SAID

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