2639221

Information

• Patent Grant
• 2639221

• References
• Source

• Patent Number

  2,639,221

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1953
  71 years ago

• CPC

  • G03C5/265 - of powders, granulates, tablets
  • C01D1/44 - Preparation in the form of granules, pieces, or other shaped products

• US Classifications

  • 423 - Chemistry of inorganic compounds
  • 427 - Coating processes
  • 430 - Radiation imagery chemistry: process, composition, or product thereof