3640937

Information

• Patent Grant
• 3640937

• References
• Source

• Patent Number

  3,640,937

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1972
  52 years ago

• CPC

  • C08G18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
  • C07F9/65216 - directly bonded
  • C08G18/12 - using two or more compounds having active hydrogen in the first polymerisation step

• US Classifications

  • 524 - Synthetic resins or natural rubbers
  • 528 - Synthetic resins or natural rubbers
  • 564 - 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