1990010

Information

• Patent Grant
• 1990010

• References
• Source

• Patent Number

  1,990,010

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1935
  90 years ago

• CPC

  • C09B7/10 - Bis-thionapthene indigos
  • C09B7/06 - Indone-thionapthene indigos

• US Classifications

  • 549 - Organic compounds
  • 548 - Organic compounds