3493989

Information

• Patent Grant
• 3493989

• References
• Source

• Patent Number

  3,493,989

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1970
  55 years ago

• CPC

  • E01H1/0809 - Loosening or dislodging by blowing ; Drying by means of gas streams
  • E01H5/10 - by application of heat for melting snow or ice, whether cleared or not, combined or not with clearing or removing mud or water
  • E01H2001/089 - Suction-effect created through blowing

• US Classifications

  • 015 - Brushing, scrubbing, and general cleaning
  • 037 - Excavating