2156890

Information

• Patent Grant
• 2156890

• References
• Source

• Patent Number

  2,156,890

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1939
  85 years ago

• CPC

  • B68G3/08 - Preparation of bed feathers from natural feathers
  • Y10S55/26 - Bag coupling

• US Classifications

  • 019 - Textiles: fiber preparation
  • 034 - Drying and gas or vapor contact with solids
  • 055 - Gas separation