DRILLING SCREW

• US 3,463,045 A
• Filed: 05/10/1966
• Issued: 08/26/1969
• Est. Priority Date: 05/10/1966
• Status: Expired due to Term

• Current Assignee: Arthur W. Prescott
• Original Assignee: Arthur W. Prescott
• Inventors: Prescott, Arthur W.
• Application Number:
  US04/548,892
• Time in Patent Office: 1,204 Days
• US Class Current: 411/387.8
• CPC Class Codes: B21K 1/56 screw-threaded elements
• CPC Class Codes: F16B 25/0021 the material being metal, e.g. sheet-metal or aluminium F16B25/0031 takes precedence
• CPC Class Codes: F16B 25/0084 characterised by geometric details of the tip
• CPC Class Codes: F16B 25/103 by means of a drilling screw-point, i.e. with a cutting and material removing action

Claims