3772141

Information

• Patent Grant
• 3772141

• References
• Source

• Patent Number

  3,772,141

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1973
  51 years ago

• CPC

  • D21H5/18 - of inorganic fibres with or without cellulose fibres
  • B44D3/18 - Boards or sheets with surfaces prepared for painting or drawing pictures Stretching frames for canvases
  • D21H13/40 - vitreous
  • D21H13/42 - Asbestos

• US Classifications

  • 162 - Paper making and fiber liberation