PATENT CLAIM ANALYSIS

Application Number: 16111461
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-01
Patent Classification: ["606", "305000"]

Abstract:
A two-piece closure for polyaxial bone screws includes an outer fastener and an inner set screw, the outer fastener having a drive system with pockets that cooperate with a pronged drive tool. The polyaxial screw includes a lower pressure insert engaged with the outer fastener, the insert in some embodiments being made from a cobalt chrome alloy.

Claim (Index 1):
A pivotal bone anchor assembly for anchoring to patient bone and coupling with an elongate rod via a closure, the pivotal bone anchor assembly comprising:\n a shank having a longitudinal axis, a head with a partial spherical shape defining a hemisphere plane perpendicular to the longitudinal axis with an outer spherical surface extending above and below the hemisphere plane, and an anchor portion extending downwardly from the head for fixation to the patient bone; a receiver having a base, a pair of integral upright arms extending upward from the base to define an open channel for receiving the elongate rod, and an axial bore centered around a longitudinal axis, the axial bore communicating with a bottom surface of the receiver base through a bottom opening and extending upwardly through the open channel to a top surface on each of the receiver upright arms, the axial bore including a non-threaded recess with a downwardly-facing surface and an upwardly-concave lower partial spherical seating surface disposed about the bottom opening and configured to receive the shank head outer spherical surface to provide for pivotal movement between the shank and the receiver; an insert top loaded into the receiver bore and having a second pair of upright arms with upper outer surfaces at least partially positionable within the receiver recess and into a biased overlapping engagement with the receiver recess downwardly-facing surface, prior to the assembly being locked by the closure, so as to prevent the insert from moving back up within the receiver, the insert further including an upwardly-facing rod engaging surface between the second pair of upright arms; and a downwardly-concave partial spherical surface disposed within the receiver axial bore, the downwardly-concave partial spherical surface being separate from and spaced below a bottom of the insert, wherein when the pivotal bone anchor assembly is fully assembled, the downwardly-concave partial spherical surface and the receiver upwardly-concave lower partial spherical seating surface have frictional engagement with the shank head outer spherical surface so as to provide a non-floppy pivotal relationship between the shank and the receiver prior to the elongate rod and the closure being positioned within the receiver open channel.

Metadata:
- Claim Count in Document: 92.0
- Percentile: 96.0
- Lexical Diversity: 1.45238
- Patent Class: 606.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14164952', '15638039', '15663316', '14872621', '13374439']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8849112277779266
- 35 USC 102 Novelty (BERT): 0.6192053843142078
- Combined Prediction Score: 0.8583406434315547
- Mean Citation Score: 517.2572240000002
- Max Citation Score: 619.7847
- Similarity Product: 593.408226295352

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test