3640668

Information

• Patent Grant
• 3640668

• References
• Source

• Patent Number

  3,640,668

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1972
  52 years ago

• CPC

  • B29C67/0048 - Local deformation of formed objects
  • B29C51/082 - by shaping between complementary mould parts
  • B29C51/30 - Moulds
  • B29C51/32 - having cutting means
  • B29C51/34 - for undercut articles
  • B29K2025/00 - Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
  • B29K2105/04 - cellular or porous
  • B29L2031/7168 - Egg-cartons
  • Y10S425/058 - Undercut

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus
  • 264 - Plastic and nonmetallic article shaping or treating: processes