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  • CPC
  • B28B21/14
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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B28Stoneworking B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL B28B21/00Methods or machines specially adapted for the production of tubular articles

Current Industry

B28B21/14vibrating
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    System for moulding tubular goods
    • Patent number 5,910,325
    • Issue date Jun 8, 1999
    • Pedershaab A/S
    • Johannes Hvidegaard
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Chimney lining former and compactor
    • Patent number 5,362,224
    • Issue date Nov 8, 1994
    • Worldwide Chimney, Inc.
    • George A. Hasti
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Acid resistant concrete articles, especially sulfur concrete pipes,...
    • Patent number 4,981,740
    • Issue date Jan 1, 1991
    • KKKK A/S
    • Leif H. A. Larsen
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Method of producing a self aligning pipe with configured joint
    • Patent number 4,686,756
    • Issue date Aug 18, 1987
    • C. R. Joelson
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Self aligning concrete pipe with configured joint
    • Patent number 4,565,381
    • Issue date Jan 21, 1986
    • C. R. Joelson
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3752626
    • Patent number 3,752,626
    • Issue date Aug 14, 1973
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3584356
    • Patent number 3,584,356
    • Issue date Jun 15, 1971
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3489626
    • Patent number 3,489,626
    • Issue date Jan 13, 1970
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3470279
    • Patent number 3,470,279
    • Issue date Sep 30, 1969
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3414952
    • Patent number 3,414,952
    • Issue date Dec 10, 1968
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3340115
    • Patent number 3,340,115
    • Issue date Sep 5, 1967
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1823180
    • Patent number 1,823,180
    • Issue date Sep 15, 1931
    • B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents