1931933

Information

• Patent Grant
• 1931933

• References
• Source

• Patent Number

  1,931,933

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1933
  91 years ago

• CPC

  • D21C3/22 - Other features of pulping processes
  • Y10S162/05 - Alpha cellulose

• US Classifications

  • 162 - Paper making and fiber liberation