US Patent No: 8,048,124

Number of patents in Portfolio can not be more than 2000

Spinal screw assembly and screw insertion tool

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ALSO PUBLISHED AS: 20100063552
ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A bone screw assembly includes a tulip-shaped seat, a bone fixation device, a ring-shaped washer, a rod and a cap. The tulip-shaped seat comprises a through opening dimensioned to receive the bone fixation device and a horizontal channel dimensioned to receive the rod. The washer is placed into the seat on top of the bone fixation device head and comprises first and second side tabs and a first pair of upward extending projections separated by a first gap and a second pair of upward extending projections separated by a second gap. The side tabs interface with a groove formed in the bottom portion of the seat. The rod is placed within the channel and positioned within a groove formed on the top surface of the washer. The cap includes first and second projections extending downward from its bottom surface and each of the first and second downward projections comprises first and second sidewise extending ridges. The first ridges of the first and second projections are aligned and placed within the first and second gaps of the washer, respectively, and interface with a first groove formed on the side portion of the seat and the second ridges interface with a second groove on the side portion of the seat when the cap is rotate.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SPINEFRONTIER INCBEVERLY, MA16

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chang, Christopher Medfield, MA 20 37
Chin, Kingsley R Philadelphia, PA 30 333
Corrao, Ernie Bethel, CT 24 138
Santangelo, Stephen New Hartford, CT 12 133
SAUNDERS, TODD - 5 4

Cited Art

Patent Info (Count) # Cites Year
 
ZIMMER SPINE, INC. (2)
2008/0275,456 INSTALLATION SYSTEMS FOR SPINAL STABILIZATION SYSTEM AND RELATED METHODS 16 2007
2009/0005,787 DEVICE AND SYSTEM FOR IMPLANTING POLYAXIAL BONE FASTENERS 8 2007
 
DEPUY ACROMED, INC. (1)
7,081,117 Locking cap assembly for spinal fixation instrumentation 106 2004
 
DEPUY SPINE SARL (1)
7,125,426 Locking cap assembly for spinal fixation instrumentation 112 2003
 
STRYKER SPINE (1)
2008/0221,583 Polyaxial screwdriver for a pedicle screw system 4 2008
 
SYNTHES USA, LLC (1)
6,077,262 Posterior spinal implant 298 1997
 
TRAIBER, S.A. (1)
2007/0288,004 Vertebral fixation device and tool for assembling the device 29 2006
 
ZIMMER GMBH (1)
6,547,789 Holding apparatus for the spinal column 85 2000
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
2007/0032,162 Spinal fixation tool set and method 7 2006

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
WARSAW ORTHOPEDIC, INC. (1)
8,323,286 Systems and methods for minimally invasive surgical procedures 0 2010

Maintenance Fees

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3.5 Year Payment $1600.00 $800.00 $400.00 May 1, 2015
7.5 Year Payment $3600.00 $1800.00 $900.00 May 1, 2019
11.5 Year Payment $7400.00 $3700.00 $1850.00 May 1, 2023
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Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00