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  • CPC
  • B28B21/86
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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

B28B21/86Cores
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Production method for a tubular fuel cell having a two-layer cap re...
    • Patent number 9,425,466
    • Issue date Aug 23, 2016
    • Robert Bosch GmbH
    • Thomas Loibl
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Method for manufacturing a composite drive shaft manufactured using...
    • Patent number 8,459,978
    • Issue date Jun 11, 2013
    • Choong O Ryu
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Method and apparatus for the production of tubes from concrete mix
    • Patent number 6,984,118
    • Issue date Jan 10, 2006
    • Institut fur Fertigteiltechnik UND
    • Helmut Kuch
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Self-actuating molds for vertically casting concrete pipe
    • Patent number 5,714,080
    • Issue date Feb 3, 1998
    • Ameron International Corporation
    • Ming C. Kuo
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Collapsible core seam cover for concrete making apparatus
    • Patent number 5,679,279
    • Issue date Oct 21, 1997
    • Hawkeye Concrete Products Co.
    • Jon A. Schmidgall
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Method of making a rigid tubular article
    • Patent number 5,433,902
    • Issue date Jul 18, 1995
    • Minnesota Mining and Manufacturing Company
    • Mikhail Leyderman
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Mandrel for making a rigid tubular article
    • Patent number 5,350,139
    • Issue date Sep 27, 1994
    • Minnesota Mining and Manufacturing Company
    • Mikhail Leyderman
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Molding device for shaping concrete parts
    • Patent number 4,737,094
    • Issue date Apr 12, 1988
    • Georg Prinzing GmbH & Co. KG Betonformen- Und Maschinenfabrik
    • Richard Kraiss
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Highway barrier with level internal ducts and construction method
    • Patent number 4,641,993
    • Issue date Feb 10, 1987
    • Associated Concrete Products
    • Walter B. Hahne
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Mold for producing concrete pipe
    • Patent number 4,614,324
    • Issue date Sep 30, 1986
    • Nippon Pressed Concrete Co., Ltd.
    • Kiichi Yamashita
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3815864
    • Patent number 3,815,864
    • Issue date Jun 11, 1974
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3778206
    • Patent number 3,778,206
    • Issue date Dec 11, 1973
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3773447
    • Patent number 3,773,447
    • Issue date Nov 20, 1973
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3468000
    • Patent number 3,468,000
    • Issue date Sep 23, 1969
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3415482
    • Patent number 3,415,482
    • Issue date Dec 10, 1968
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3307248
    • Patent number 3,307,248
    • Issue date Mar 7, 1967
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2680276
    • Patent number 2,680,276
    • Issue date Jun 8, 1954
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2602979
    • Patent number 2,602,979
    • Issue date Jul 15, 1952
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1598059
    • Patent number 1,598,059
    • Issue date Aug 31, 1926
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1592486
    • Patent number 1,592,486
    • Issue date Jul 13, 1926
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1481807
    • Patent number 1,481,807
    • Issue date Jan 29, 1924
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1406578
    • Patent number 1,406,578
    • Issue date Feb 14, 1922
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1406577
    • Patent number 1,406,577
    • Issue date Feb 14, 1922
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1399308
    • Patent number 1,399,308
    • Issue date Dec 6, 1921
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1387066
    • Patent number 1,387,066
    • Issue date Aug 9, 1921
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1387067
    • Patent number 1,387,067
    • Issue date Aug 9, 1921
    • B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents