1840997

Information

• Patent Grant
• 1840997

• References
• Source

• Patent Number

  1,840,997

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1932
  92 years ago

• CPC

  • D06N5/00 - Roofing materials comprising a fibrous web coated with bitumen or another polymer
  • Y10S83/92 - Shingle making
  • Y10T83/0534 - Cutting to join blanked holes
  • Y10T83/0553 - Effected by plural steps

• US Classifications

  • 083 - Cutting