![[Rutgers, The State University of New Jersey]](webimages/ru-black-narrow.gif)
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 & Power • Mining & Ore Milling
Miscellany •
Motion Pictures • Phonographs & Sound Recording •
Telegraphy & Telephony
| No. | Executed | Applied | Issued | PatentNo. | Title |
|---|---|---|---|---|---|
| 767. | 01/09/00 | 01/11/00 | 10/30/00 | 660,845 | Apparatus for Sampling, Averaging, Mixing, and Storing Materials in Bulk |
| 768. | 01/09/00 | 01/11/00 | 11/20/00 | 662,063 | Process of Sampling, Averaging, Mixing, and Storing Materials in Bulk |
| 769. | 01/24/00 | 01/31/00 | 07/30/01 | 679,500 | Apparatus for Screening or Sizing Very Fine Materials |
| 770. | 02/23/00 | 03/07/00 | 04/02/01 | 671,316 | Apparatus for Screening or Rescreening Fine Materials |
| 771. | 03/28/00 | 03/31/00 | 04/02/01 | 671,317 | Method of Screening or Rescreening Fine Materials |
| 772. | 04/10/00 | 04/19/00 | 05/10/04 | 759,356 | Method of Burning Portland-Cement Clinker, &c. |
| 773. | 04/10/00 | 04/19/00 | 05/10/04 | 759,357 | Apparatus for Burning Portland-Cement Clinker &c. |
| 782. | 08/01/00 | 08/09/00 | 04/23/01 | 672,617 | Apparatus for Breaking Rock |
| 799. | 12/24/01 | 01/02/02 | 07/31/06 | 827,089 | Calcining-Furnace |
| 812. | 11/13/02 | 12/05/02 | 10/24/05 | 802,631 | Apparatus for Burning Portland-Cement Clinker |
| 814. | 12/18/02 | 01/09/03 | 03/31/03 | 724,089 | Means for Operating Motors in Dust-Laden Atmospheres |
| 816. | 12/18/02 | 01/09/03 | 04/26/04 | 758,432 | Stock-House Conveyer |
| 817. | 12/18/02 | 01/09/03 | 10/02/06 | 832,046 | Automatic Weighing and Mixing Apparatus |
| 818. | 12/18/02 | 01/13/03 | 12/10/07 | 873,219 | Feed-Regulator for Grinding-Machines |
| 819. | 12/18/02 | 01/13/03 | 01/16/12 | 1,014,818 | Giant Rolls |
| 820. | 01/22/03 | 01/29/03 | 01/22/07 | 841,677 | Apparatus for Grinding and Separating Fine Materials |
| 824. | 04/27/03 | 05/04/03 | 11/29/04 | 775,965 | Dry Separator |
| 826. | 07/20/03 | 07/22/03 | 11/22/04 | 775,600 | Rotary Cement-Kiln |
| 838. | 06/20/04 | 06/28/04 | 07/23/07 | 861,241 | Portland Cement and Process of Manufacturing the Same |
| 852. | 10/29/04 | 11/02/04 | 02/27/06 | 813,490 | Cement-Kiln |
| 876. | 09/28/05 | 09/29/05 | 09/07/15 | 1,152,613 | Method of Burning Portland-Cement Clinker |
| 887. | 01/24/06 | 01/27/06 | 06/24/13 | 1,065,597 | Cement-Burning Kiln |
| 889. | 05/07/06 | 05/08/06 | 04/22/13 | 1,059,661 | Manufacture of Portland Cement |
| 891. | 09/04/06 | 09/07/06 | 06/28/10 | 962,822 | Crushing-Roll |
| 892. | 09/11/06 | 09/13/06 | 06/01/09 | 923,633 | Shaft-Coupling |
| 893. | 09/11/06 | 09/18/06 | 06/28/10 | 962,823 | Crushing-Rolls |
| 894. | 10/22/06 | 10/24/06 | 08/10/09 | 930,946 | Apparatus for Burning Portland Cement |
| 896. | 11/16/06 | 11/26/06 | 08/10/09 | 930,948 | Apparatus for Burning Portland Cement |
| 897. | 11/16/06 | 11/26/06 | 09/10/09 | 930,949 | Apparatus for Burning Portland Cement |
| 898. | 11/23/06 | 11/27/06 | 06/16/08 | 890,625 | Apparatus for Grinding Coal |
| 906. | 02/08/07 | 03/08/07 | 11/09/09 | 939,817 | Cement-Kiln |
| 911. | 02/25/07 | 04/02/07 | 11/30/09 | 941,630 | Process and Apparatus for Artificially Aging or Seasoning Portland Cement |
| 915. | 06/11/07 | 06/14/07 | 07/30/07 | 861,819 | Discharging Apparatus for Belt Conveyers |
| 916. | 06/11/07 | 06/14/07 | 05/02/11 | 991,433 | Bucket Conveyer |
| 917. | 06/11/07 | 06/26/07 | 04/12/10 | 954,789 | Sprocket-Chain Drive |
| 919. | 11/19/07 | 11/22/07 | 10/22/12 | 1,041,756 | Conveyer |
| 920. | 11/25/07 | 11/29/07 | 09/11/14 | 1,106,444 | Fuel-Feeding Apparatus |
| 922. | 02/04/08 | 02/06/08 | 01/12/09 | 909,167 | Waterproofing-Paint for Portland-Cement Buildings |
| 928. | 03/13/08 | 03/23/08 | 12/28/09 | 944,481 | Process and Apparatus for Artificially Aging or Seasoning Portland Cement |
| 934. | 05/27/08 | 06/01/08 | 01/12/09 | 909,169 | Waterproofing-Paint for Portland-Cement Structures |
| 935. | 06/08/08 | 06/11/08 | 05/23/11 | 993,294 | Device for Feeding Pulverulent Material |
| 938. | 08/10/08 | 08/13/08 | 03/13/17 | 1,219,272 | Process of Constructing Concrete Buildings |
| 940. | 10/10/08 | 10/14/08 | 06/27/11 | 996,070 | Rotary Kiln |
| 943. | 11/21/08 | 11/25/08 | 08/03/15 | 1,148,832 | Means for Utilizing the Waste Heat in Kilns |
| 945. | 12/22/08 | 12/29/08 | 01/05/15 | 1,123,261 | Mold for Concrete Construction |
| 946. | 01/27/09 | 02/06/09 | 09/05/11 | 1,002,504 | Crushing and Separating Fine Materials |
| 947. | 02/15/09 | 03/27/09 | 08/10/09 | 930,947 | Gas-Purifier |
| 972. | 07/02/10 | 07/07/10 | 01/11/16 | 1,167,637 | Method of Utilizing Waste Heat in Kilns |
| 1038. | 01/16/17 | 01/18/17 | 12/30/19 | 1,326,854 | Apparatus for the Production of Concrete Structures |
