1689740

Information

• Patent Grant
• 1689740

• References
• Source

• Patent Number

  1,689,740

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1928
  96 years ago

• CPC

  • C09B45/38 - Preparation from compounds with -OH and -COOH adjacent in the same ring or in peri position

• US Classifications

  • 534 - Organic compounds