3644138

Information

• Patent Grant
• 3644138

• References
• Source

• Patent Number

  3,644,138

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1972
  52 years ago

• CPC

  • D21H13/42 - Asbestos
  • B01D39/06 - Inorganic material
  • B01D39/2086 - sintered or bonded by inorganic agents
  • C03C25/42 - Coatings containing inorganic materials
  • D06M7/005 - made of asbestos
  • D21H5/183 - of asbestos fibres

• US Classifications

  • 427 - Coating processes
  • 162 - Paper making and fiber liberation