1709989

Information

• Patent Grant
• 1709989

• References
• Source

• Patent Number

  1,709,989

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1929
  95 years ago

• CPC

  • C09B29/14 - Hydroxy carboxylic acids

• US Classifications

  • 534 - Organic compounds
  • 246 - Railway switches and signals