3620990

Information

• Patent Grant
• 3620990

• References
• Source

• Patent Number

  3,620,990

• Date Filed

  Not available

• Date Issued

  Tuesday, November 16, 1971
  54 years ago

• CPC

  • C08J9/02 - using blowing gases generated by the reacting monomers or modifying agents during the preparation or modification of macromolecules
  • C08G63/58 - Cyclic ethers Cyclic carbonates Cyclic sulfites; Cyclic orthoesters
  • Y10S521/913 - Cell forming in absence of external heat

• US Classifications

  • 521 - Synthetic resins or natural rubbers
  • 525 - Synthetic resins or natural rubbers