3898172

Information

• Patent Grant
• 3898172

• References
• Source

• Patent Number

  3,898,172

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1975
  49 years ago

• CPC

  • G01N21/81 - Indicating humidity
  • C09B67/0097 - Dye preparations of special physical nature; Tablets, films, extrusion, microcapsules, sheets, pads, bags with dyes
  • G01N31/222 - for investigating moisture content
  • Y10S252/963 - Humidity or moisture indicators

• US Classifications

  • 252 - Compositions
  • 073 - Measuring and testing
  • 116 - Signals and indicators