3442992

Information

• Patent Grant
• 3442992

• References
• Source

• Patent Number

  3,442,992

• Date Filed

  Not available

• Date Issued

  Tuesday, May 6, 1969
  55 years ago

• CPC

  • B29C67/20 - for porous or cellular articles
  • B29C53/60 - using internal forming surfaces
  • Y10S425/126 - Silo mold

• US Classifications

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