1972500

Information

• Patent Grant
• 1972500

• References
• Source

• Patent Number

  1,972,500

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1934
  90 years ago

• CPC

  • F16L58/16 - the coating being in the form of a bandage
  • B32B19/046 - of paper or cardboard
  • Y10S428/92 - Fire or heat protection feature
  • Y10T428/1303 - Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
  • Y10T428/24149 - Honeycomb-like
  • Y10T428/24727 - with planar component
  • Y10T442/2484 - Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting

• US Classifications

  • 138 - Pipes and tubular conduits
  • 162 - Paper making and fiber liberation
  • 428 - Stock material or miscellaneous articles
  • 442 - Fabric