3457205

Information

• Patent Grant
• 3457205

• References
• Source

• Patent Number

  3,457,205

• Date Filed

  Not available

• Date Issued

  Tuesday, July 22, 1969
  55 years ago

• CPC

  • C08J9/34 - Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
  • B29C41/22 - Making multilayered or multicoloured articles
  • B29C44/043 - using a rotating mould
  • B29C67/222 - using expandable particles or beads as starting material
  • B29C41/06 - about two or more axes
  • C08J2325/06 - Polystyrene

• US Classifications

  • 521 - Synthetic resins or natural rubbers
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 525 - Synthetic resins or natural rubbers