1566239

Information

• Patent Grant
• 1566239

• References
• Source

• Patent Number

  1,566,239

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1925
  99 years ago

• CPC

  • D21H21/26 - Agents rendering paper transparent or translucent
  • D21H25/005 - Mechanical treatment
  • Y10T29/471 - of water laid fibrous article [e.g., paper]

• US Classifications

  • 029 - Metal working
  • 134 - Cleaning and liquid contact with solids
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 359 - Optical: systems and elements