3505295

Information

• Patent Grant
• 3505295

• References
• Source

• Patent Number

  3,505,295

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1970
  55 years ago

• CPC

  • C07D487/04 - Ortho-condensed systems
  • C07D205/10 - having two double bonds between ring members or between ring members and non-ring members
  • C07D209/48 - with oxygen atoms in positions 1 and 3
  • C08G73/1007 - from tetracarboxylic acids or derivatives and diamines

• US Classifications

  • 528 - Synthetic resins or natural rubbers