only oxygen-containing hetero rings

Patents Grantslast 30 patents

  • Information Patent Grant

    3923838

    • Patent number 3,923,838
    • Issue date Dec 2, 1975
    • C07 - ORGANIC CHEMISTRY
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    3448030

    • Patent number 3,448,030
    • Issue date Jun 3, 1969
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    2005810

    • Patent number 2,005,810
    • Issue date Jun 25, 1935
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    1878987

    • Patent number 1,878,987
    • Issue date Sep 20, 1932
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...