2228636

Information

• Patent Grant
• 2228636

• References
• Source

• Patent Number

  2,228,636

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1941
  84 years ago

• CPC

  • B28B21/40 - by evacuating one or more of the mould parts; Vacuum machines

• US Classifications

  • 162 - Paper making and fiber liberation
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 425 - Plastic article or earthenware shaping or treating: apparatus