2977636

Information

• Patent Grant
• 2977636

• References
• Source

• Patent Number

  2,977,636

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1961
  64 years ago

• CPC

  • B29C41/14 - Dipping a core
  • B29D99/0071 - Masks
  • A61M2016/0661 - with customised shape
  • B29K2021/00 - Use of unspecified rubbers as moulding material
  • B29L2031/4835 - Masks
  • Y10S264/52 - Processes of making corrugated tubes for gas mask

• US Classifications

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