3720498

Information

• Patent Grant
• 3720498

• References
• Source

• Patent Number

  3,720,498

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1973
  52 years ago

• CPC

  • C23F11/1676 - Phosphonic acids
  • C02F1/542 - Phosphorus compounds
  • C02F5/14 - containing phosphorus
  • C07D233/16 - Radicals substituted by nitrogen atoms
  • C07F9/3817 - Acids containing the structure (RX)2P(=X)-alk-N...P (X = O, S, Se)
  • C07F9/65061 - the phosphorus atom is bonded to a cyclic nitrogen atom, directly, through one or more heteroatoms or through a hydrocarbon chain which may be broken by one or more heteroatoms
  • C07F9/6533 - Six-membered rings
  • C07F9/65583 - each of the hetero rings containing nitrogen as ring hetero atom
  • C23F14/02 - by chemical means
  • Y10S507/939 - Corrosion inhibitor

• US Classifications

  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
  • 252 - Compositions
  • 507 - Earth boring, well treating, and oil field chemistry
  • 987 - Organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system