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:
Sep. 16, 2014
Filed:
May. 25, 2012
Kingsley R. Chin, Wilton Manors, FL (US);
Craig Henshaw, Charlestown, MA (US);
Matthew Ibarra, Lakewood, CA (US);
Vito Lore, Somerville, MA (US);
Jeremy Crossgrove, Storrs, CT (US);
Kingsley R. Chin, Wilton Manors, FL (US);
Craig Henshaw, Charlestown, MA (US);
Matthew Ibarra, Lakewood, CA (US);
Vito Lore, Somerville, MA (US);
Jeremy Crossgrove, Storrs, CT (US);
Spinefrontier Inc, Beverly, MA (US);
Abstract
A cannula assembly for providing percutaneous access in minimally invasive spinal surgeries, includes an outer cannula, a nerve probe dilator and a multistage dilator system comprising a first dilator, a second dilator, a third dilator and a fourth dilator. The outer cannula and the dilators are slidable relative to each other and are arranged sequentially so that the fourth dilator surrounds the nerve probe dilator, the third dilator slides over a surface of the fourth dilator, the second dilator slides over a surface of the third dilator, the first dilator slides over a surface of the second dilator, and the outer cannula surrounds the first dilator.