Patent US6071310A successfully refreshed from Google Patents.
US6071310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinal implant
Assignee: Individual
•
Filing: 1998-11-23
•
Granted: 2000-06-06
•
Expires: 2018-11-23
Abstract
Abstract A spinal implant including a hollow, generally tubular shell having an exterior lateral surface, a leading end, and a trailing end. The shell has a helical thread projecting from its exterior surface. The thread includes a plurality of pillars. Each pillar has a height of 100-4500 microns and a lateral dimension at the widest point of 100-4500 microns. The exterior surface has a plurality of holes therethrough to permit bone growth therethrough. The spinal implant may alternatively have a plurality of pillars projecting from its exterior surface in a regular, non-helical array.
Inventors
- 👤 George J. Picha
- 👤 Jeffrey A. Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/446; A61F2/30767; A61F2/30771; A61F2/442; A61F2/28; A61F2002/2817; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/30126; A61F2002/30138; A61F2002/30153; A61F2002/30154; A61F2002/30199; A61F2002/30224; A61F2002/30228; A61F2002/30235; A61F2002/30316; A61F2002/30535; A61F2002/30593; A61F2002/30772; A61F2002/30784; A61F2002/30787; A61F2002/3085; A61F2002/30858; A61F2002/30868; A61F2002/30869; A61F2002/30871; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2230/0017; A61F2230/0019; A61F2230/0021; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00592; A61F2310/00796; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/909
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
102 words
A spinal implant comprising a hollow, generally tubular shell having an exterior surface, a first end, and a second end, said shell having a helical thread projecting from said exterior surface, said thread comprising a plurality of pillars, each pillar having a height of between about 100-4500 microns and a dimension in a direction perpendicular to the height of between about 100-4500 microns, so as to facilitate bone ingrowth and mechanical anchoring of said spinal implant and to discourage formation of a fibrous capsule around said spinal implant, said exterior surface having a plurality of holes therethrough to permit bone growth therethrough.
Claim 2
Dependent Claim
102 words
A spinal implant comprising a hollow, generally tubular shell having an exterior surface, a first end, and a second end, said shell having a helical thread projecting from said exterior surface, said thread comprising a plurality of pillars, each pillar having a height of between about 100-4500 microns and a dimension in a direction perpendicular to the height of between about 100-4500 microns, so as to facilitate bone ingrowth and mechanical anchoring of said spinal implant and to discourage formation of a fibrous capsule around said spinal implant, said exterior surface having a plurality of holes therethrough to permit bone growth therethrough.
Claim 3
Dependent Claim
40 words
A spinal implant according to claim 1, each pillar being substantially square in top view and having a height of 150-2000 microns, a width of 200-1500 microns, and at least some adjacent pillars having an edge-to-edge distance of 100-4500 microns.
Claim 4
Dependent Claim
48 words
A spinal implant according to claim 1, each pillar being substantially rectangular in top view and having a width of 100-1000 microns and a length of 400-4500 microns and a height of 150-2000 microns, and adjacent pillars in the same thread having an edge-to-edge distance of 100-4500 microns.
Claim 5
Dependent Claim
25 words
A spinal implant according to claim 1, a plurality of said pillars having a side surface which is undercut at an undercut angle of 5°-30°.
Claim 6
Dependent Claim
43 words
A spinal implant according to claim 1, said thread comprising a plurality of pairs of pillars, each pair of pillars being two pillars which are side-by-side, each pair defining a line which is laterally oriented with respect to the direction of the thread.
Claim 7
Dependent Claim
14 words
A spinal implant according to claim 1, each pillar being substantially without sharp edges.
Claim 8
Dependent Claim
27 words
A spinal implant according to claim 1, said helical thread defining a helical valley between turns of said thread, a plurality of pillars projecting from said valley.
Claim 9
Dependent Claim
47 words
A spinal implant according to claim 3, wherein at least some of said rectangular pillars are arranged in pairs, each pair of rectangular pillars being two pillars which are side-by-side, each pair defining a line which is laterally oriented with respect to the direction of the thread.
Claim 10
Dependent Claim
34 words
A spinal implant according to claim 3, wherein said thread has a longitudinal axis, and wherein at least some of said rectangular pillars are angled with respect to said longitudinal axis of said thread.
Claim 11
Dependent Claim
53 words
A spinal implant according to claim 3, wherein said thread has a longitudinal axis, and wherein said rectangular pillars are disposed at angles with respect to said longitudinal axis of said thread, said angles alternating in adjacent threads such that the rectangular pillars in adjacent turns of the thread form a herringbone arrangement.
Claim 12
Dependent Claim
31 words
A spinal implant according to claim 10, said helical thread defining a helical valley between turns of said thread, a plurality of holes being provided in said valley through said shell.
Claim 13
Dependent Claim
28 words
A spinal implant according to claim 1, a hole through said shell being provided between a pair of said pillars which are adjacent one another in said thread.
Claim 14
Dependent Claim
31 words
A spinal implant according to claim 1, said helical thread defining a helical valley between turns of said thread, a plurality of holes being provided in said valley through said shell.
Claim 15
Dependent Claim
15 words
A spinal implant according to claim 1, said implant being coated with bone inductive agent.
Claim 16
Dependent Claim
17 words
A spinal implant according to claim 1, wherein each of said pillars has an outer planar surface.
References Cited (Backward Citations)
US4017571A
Cited
US4272855A
Cited
US4385405A
Cited
US4608052A
Cited
US4673409A
Cited
US4828563A
Cited
US4846834A
Cited
US4834757A
Cited
US4772287A
Cited
US4904260A
Cited
US4955907A
Cited
US4865603A
Cited
US5484437A
Cited
US5015247A
Cited
US5593409A
Cited
US5505732A
Cited
US5522899A
Cited
US4961740B1
Cited
US4961740A
Cited
US5026373A
Cited
US5015255A
Cited
US5445639A
Cited
US5062845A
Cited
US5489308A
Cited
US5458638A
Cited
US5306308A
Cited
US5055104A
Cited
US5059193A
Cited
US5236453A
Cited
US5158571A
Cited
US5306307A
Cited
US5180381A
Cited
US5207709A
Cited
US5263953A
Cited
US5306309A
Cited
US5545164A
Cited
US5496318A
Cited
US5489307A
Cited
US5330473A
Cited
US5702450A
Cited
US5683463A
Cited
US5514180A
Cited
US5658337A
Cited
USD377096S
Cited
USD377095S
Cited
US5545166A
Cited
US5800547A
Cited
US5702391A
Cited
US5709683A
Cited
US5876457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-06 | 2003-12-06 | 2004-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-06 | 2007-12-06 | 2008-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-06 | 2011-12-06 | 2012-06-06 | $7700.00 | Window Closed / Lapsed |