1536857

Information

• Patent Grant
• 1536857

• References
• Source

• Patent Number

  1,536,857

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1925
  99 years ago

• CPC

  • B29D99/0071 - Masks
  • B29L2031/4835 - Masks
  • Y10S264/52 - Processes of making corrugated tubes for gas mask
  • Y10S425/816 - Gas mask

• US Classifications

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