237309

Information

• Patent Grant
• 237309

• References
• Source

• Patent Number

  237,309

• Date Filed

  Not available

• Date Issued

  Tuesday, February 1, 1881
  145 years ago

• CPC

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

• US Classifications

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