1991786

Information

• Patent Grant
• 1991786

• References
• Source

• Patent Number

  1,991,786

• Date Filed

  Not available

• Date Issued

  Tuesday, February 19, 1935
  89 years ago

• CPC

  • D21C9/08 - Removal of fats, resins, pitch or waxes; Chemical or physical purification
  • Y10S162/05 - Alpha cellulose

• US Classifications

  • 162 - Paper making and fiber liberation