1920541

Information

• Patent Grant
• 1920541

• References
• Source

• Patent Number

  1,920,541

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1933
  91 years ago

• CPC

  • D21H23/30 - Pretreatment of the paper
  • D21H5/0007 - Pretreatment of paper to which liquids or other fluent materials are to be applied

• US Classifications

  • 427 - Coating processes