Cement Patents

The following list contains the 49 patents Edison received concerning cement. It is arranged in chronological order by execution date, which is the date on which Edison signed the application and the date in the patenting process that comes closest to the time of actual inventive activity. The application date is the date on which the Patent Office received and recorded the application; the issue date, the time at which the patent, having passed inspection and any legal challenges, was awarded.

Batteries • Cement • Electric Light & PowerMining & Ore Milling
Miscellany Motion PicturesPhonographs & Sound Recording Telegraphy & Telephony

No. ExecutedApplied IssuedPatentNo.Title
767.01/09/0001/11/0010/30/00660,845Apparatus for Sampling, Averaging, Mixing, and Storing Materials in Bulk
768.01/09/0001/11/0011/20/00662,063Process of Sampling, Averaging, Mixing, and Storing Materials in Bulk
769.01/24/0001/31/0007/30/01679,500Apparatus for Screening or Sizing Very Fine Materials
770.02/23/0003/07/0004/02/01671,316Apparatus for Screening or Rescreening Fine Materials
771.03/28/0003/31/0004/02/01671,317Method of Screening or Rescreening Fine Materials
772.04/10/0004/19/0005/10/04759,356Method of Burning Portland-Cement Clinker, &c.
773.04/10/0004/19/0005/10/04759,357Apparatus for Burning Portland-Cement Clinker &c.
782.08/01/0008/09/0004/23/01672,617Apparatus for Breaking Rock
799.12/24/0101/02/0207/31/06827,089Calcining-Furnace
812.11/13/0212/05/0210/24/05802,631Apparatus for Burning Portland-Cement Clinker
814.12/18/0201/09/0303/31/03724,089Means for Operating Motors in Dust-Laden Atmospheres
816.12/18/0201/09/0304/26/04758,432Stock-House Conveyer
817.12/18/0201/09/0310/02/06832,046Automatic Weighing and Mixing Apparatus
818.12/18/0201/13/0312/10/07873,219Feed-Regulator for Grinding-Machines
819.12/18/0201/13/0301/16/121,014,818Giant Rolls
820.01/22/0301/29/0301/22/07841,677Apparatus for Grinding and Separating Fine Materials
824.04/27/0305/04/0311/29/04775,965Dry Separator
826.07/20/0307/22/0311/22/04775,600Rotary Cement-Kiln
838.06/20/0406/28/0407/23/07861,241Portland Cement and Process of Manufacturing the Same
852.10/29/0411/02/0402/27/06813,490Cement-Kiln
876.09/28/0509/29/0509/07/151,152,613Method of Burning Portland-Cement Clinker
887.01/24/0601/27/0606/24/131,065,597Cement-Burning Kiln
889.05/07/0605/08/0604/22/131,059,661Manufacture of Portland Cement
891.09/04/0609/07/0606/28/10962,822Crushing-Roll
892.09/11/0609/13/0606/01/09923,633Shaft-Coupling
893.09/11/0609/18/0606/28/10962,823Crushing-Rolls
894.10/22/0610/24/0608/10/09930,946Apparatus for Burning Portland Cement
896.11/16/0611/26/0608/10/09930,948Apparatus for Burning Portland Cement
897.11/16/0611/26/0609/10/09930,949Apparatus for Burning Portland Cement
898.11/23/0611/27/0606/16/08890,625Apparatus for Grinding Coal
906.02/08/0703/08/0711/09/09939,817Cement-Kiln
911.02/25/0704/02/0711/30/09941,630Process and Apparatus for Artificially Aging or Seasoning Portland Cement
915.06/11/0706/14/0707/30/07861,819Discharging Apparatus for Belt Conveyers
916.06/11/0706/14/0705/02/11991,433Bucket Conveyer
917.06/11/0706/26/0704/12/10954,789Sprocket-Chain Drive
919.11/19/0711/22/0710/22/121,041,756Conveyer
920.11/25/0711/29/0709/11/141,106,444Fuel-Feeding Apparatus
922.02/04/0802/06/0801/12/09909,167Waterproofing-Paint for Portland-Cement Buildings
928.03/13/0803/23/0812/28/09944,481Process and Apparatus for Artificially Aging or Seasoning Portland Cement
934.05/27/0806/01/0801/12/09909,169Waterproofing-Paint for Portland-Cement Structures
935.06/08/0806/11/0805/23/11993,294Device for Feeding Pulverulent Material
938.08/10/0808/13/0803/13/171,219,272Process of Constructing Concrete Buildings
940.10/10/0810/14/0806/27/11996,070Rotary Kiln
943.11/21/0811/25/0808/03/151,148,832Means for Utilizing the Waste Heat in Kilns
945.12/22/0812/29/0801/05/151,123,261Mold for Concrete Construction
946.01/27/0902/06/0909/05/111,002,504Crushing and Separating Fine Materials
947.02/15/0903/27/0908/10/09930,947Gas-Purifier
972.07/02/1007/07/1001/11/161,167,637Method of Utilizing Waste Heat in Kilns
1038.01/16/1701/18/1712/30/191,326,854Apparatus for the Production of Concrete Structures
-----