3504901

Information

• Patent Grant
• 3504901

• References
• Source

• Patent Number

  3,504,901

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1970
  54 years ago

• CPC

  • C08G18/7685 - containing two or more non-condensed aromatic rings directly linked to each other
  • B61G9/14 - with rubber springs
  • C08G18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
  • C08G18/4238 - derived from dicarboxylic acids and dialcohols

• US Classifications

  • 267 - Spring devices
  • 528 - Synthetic resins or natural rubbers
  • D21 - Games, toys, and sports goods