447972

Information

• Patent Grant
• 447972

• References
• Source

• Patent Number

  447,972

• Date Filed

  Not available

• Date Issued

  Tuesday, March 10, 1891
  134 years ago

• CPC

  • B28B7/362 - specially for making moulded articles from concrete with exposed aggregate
  • B29C41/14 - Dipping a core

• US Classifications

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