643578

Information

• Patent Grant
• 643578

• References
• Source

• Patent Number

  643,578

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1900
  125 years ago

• CPC

  • C01B17/82 - of sulfuric acid using a nitrogen oxide process

• US Classifications

  • 423 - Chemistry of inorganic compounds