3740140

Information

• Patent Grant
• 3740140

• References
• Source

• Patent Number

  3,740,140

• Date Filed

  Not available

• Date Issued

  Tuesday, June 19, 1973
  51 years ago

• CPC

  • G03B27/20 - by using a vacuum or fluid pressure
  • G03B27/303 - Gas processing

• US Classifications

  • 355 - Photocopying