1990852

Information

• Patent Grant
• 1990852

• References
• Source

• Patent Number

  1,990,852

• Date Filed

  Not available

• Date Issued

  Tuesday, February 12, 1935
  90 years ago

• CPC

  • D06P1/227 - Specific dyes not provided for in groups D06P1/228 - D06P1/28
  • D06P5/151 - with acids or bases

• US Classifications

  • 008 - Bleaching and dyeing