The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Mar. 14, 2000
Applicant:
Inventors:
Robert L. Doubler, Ida, MI (US);
John E. Hammill, Sr., Rossford, OH (US);
Jeffrey Lasner, Purchase, NY (US);
Assignee:
Hammill Manufacturing Co., Toledo, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 1/786 ;
U.S. Cl.
CPC ...
A61B 1/786 ;
Abstract
A screw for use in spinal and other surgical procedures has a tapered core and fixed pitch threads. The threads have a compound curved inferior surface and constant width crest. The screw may be provided with a helical thread in which at least the lead thread adjacent to the screw tip is ledged and the following threads have sharp apices. A method of making the screw requires two tool bits making two different angular cuts to the inferior surface of the threads.