1891337

Information

• Patent Grant
• 1891337

• References
• Source

• Patent Number

  1,891,337

• Date Filed

  Not available

• Date Issued

  Tuesday, December 20, 1932
  92 years ago

• CPC

  • D21C3/024 - with NH3 or H2O
  • Y10S162/05 - Alpha cellulose

• US Classifications

  • 162 - Paper making and fiber liberation