having four or more phosphorus atoms as ring hetero atoms

Patents Grantslast 30 patents

  • Information Patent Grant

    Chiral dihydrobenzoazaphosphole ligands and synthesis thereof

    • Patent number 10,196,413
    • Issue date Feb 5, 2019
    • Boehringer Ingelheim International GmbH
    • Soumik Biswas
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    3420864

    • Patent number 3,420,864
    • Issue date Jan 7, 1969
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    2479407

    • Patent number 2,479,407
    • Issue date Aug 16, 1949
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    2441331

    • Patent number 2,441,331
    • Issue date May 11, 1948
    • C07 - ORGANIC CHEMISTRY