3122557

Information

• Patent Grant
• 3122557

• References
• Source

• Patent Number

  3,122,557

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1964
  61 years ago

• CPC

  • C07D405/12 - linked by a chain containing hetero atoms as chain links
  • A01N43/16 - with oxygen as the ring hetero atom
  • C07D309/38 - One oxygen atom in position 2 or 4
  • C07D311/44 - with one hydrogen atom in position 3
  • C07D493/10 - Spiro-condensed systems
  • C07F9/6561 - containing systems of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring or ring system, with or without other non-condensed hetero rings
  • G03C1/685 - Compositions containing spiro-condensed pyran compounds or derivatives thereof, as photosensitive substances

• US Classifications

  • 546 - Organic compounds
  • 549 - Organic compounds
  • 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