1547907

Information

• Patent Grant
• 1547907

• References
• Source

• Patent Number

  1,547,907

• Date Filed

  Not available

• Date Issued

  Tuesday, July 28, 1925
  99 years ago

• CPC

  • D21C3/26 - Multistage processes
  • D21C3/14 - ammonium bisulfite
  • D21C11/0007 - Recovery of by-products

• US Classifications

  • 162 - Paper making and fiber liberation