TREA

Harold G. Sowman

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  • Maplewood, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Microcrystalline alumina-based ceramic articles
    • Patent number 5,185,299
    • Issue date Feb 9, 1993
    • Minnesota Mining and Manufacturing Company
    • Thomas E. Wood
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Sol gel-derived ceramic bubbles
    • Patent number 5,077,241
    • Issue date Dec 31, 1991
    • Minnesota Mining and Manufacturing Company
    • Kyung H. Moh
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Internally modified ceramic fiber
    • Patent number 5,017,316
    • Issue date May 21, 1991
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Refractory fibers of alumina and organic residue
    • Patent number 4,929,578
    • Issue date May 29, 1990
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • D03 - WEAVING
  • Information Patent Grant

    Ceramic articles containing silicon carbide
    • Patent number 4,883,779
    • Issue date Nov 28, 1989
    • Minnesota Mining and Manufacturing Company
    • Jerome W. McAllister
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Silica coating
    • Patent number 4,816,333
    • Issue date Mar 28, 1989
    • Minnesota Mining and Manufacturing Company
    • Roger W. Lange
    • G02 - OPTICS
  • Information Patent Grant

    Refractory fibers of alumina and amorphous phosphorus pentoxide
    • Patent number 4,801,562
    • Issue date Jan 31, 1989
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • D03 - WEAVING
  • Information Patent Grant

    Ceramic articles containing silicon carbide
    • Patent number 4,800,180
    • Issue date Jan 24, 1989
    • Minnesota Mining and Manufacturing Company
    • Jerome W. McAllister
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Internally modified ceramic fiber
    • Patent number 4,797,378
    • Issue date Jan 10, 1989
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Microcrystalline transition metal oxide spinel articles
    • Patent number 4,757,036
    • Issue date Jul 12, 1988
    • Minnesota Mining and Manufacturing Company
    • David R. Kaar
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Graded refractory cermet article
    • Patent number 4,743,511
    • Issue date May 10, 1988
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Graded refractory cermet article
    • Patent number 4,713,300
    • Issue date Dec 15, 1987
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Articles containing non-fused aluminum oxide-based abrasive mineral
    • Patent number 4,518,397
    • Issue date May 21, 1985
    • Minnesota Mining and Manufacturing Company
    • Melvin A. Leitheiser
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Non-vitreous ceramic metal oxide microcapsules and process for maki...
    • Patent number 4,349,456
    • Issue date Sep 14, 1982
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Non-fused aluminum oxide-based abrasive mineral
    • Patent number 4,314,827
    • Issue date Feb 9, 1982
    • Minnesota Mining and Manufacturing Company
    • Melvin A. Leitheiser
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Shaped and fired articles of TiO.sub.2
    • Patent number 4,166,147
    • Issue date Aug 28, 1979
    • Minnesota Mining and Manufacturing Company
    • Roger W. Lange
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Alumina-chromia-metal (IV) oxide refractory fibers having a microcr...
    • Patent number 4,125,406
    • Issue date Nov 14, 1978
    • Minnesota Mining and Manufacturing Company
    • Harold G. Sowman
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Ultraviolet absorbing coatings
    • Patent number 4,112,186
    • Issue date Sep 5, 1978
    • Minnesota Mining and Manufacturing Company
    • Roger W. Lange
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Ultraviolet absorbing coatings
    • Patent number 4,089,996
    • Issue date May 16, 1978
    • Minnesota Mining and Manufacturing Company
    • Roger W. Lange
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Non-frangible alumina-silica fibers
    • Patent number 4,047,965
    • Issue date Sep 13, 1977
    • Minnesota Mining and Manufacturing Company
    • Karl A. Karst
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Coated particles
    • Patent number 4,022,660
    • Issue date May 10, 1977
    • General Atomic Company
    • James R. Johnson
    • G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
  • Information Patent Grant

    Method for producing boron carbide spherules
    • Patent number 4,012,474
    • Issue date Mar 15, 1977
    • General Atomic Company
    • Harold G. Sowman
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES