Patent US4687424A successfully refreshed from Google Patents.
US6692434B2
Expired / Lapsed
US
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Method and device for retractor for microsurgical intermuscular lumbar arthrodesis
Assignee: Individual
•
Filing: 2001-10-01
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Granted: 2004-02-17
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Expires: 2021-10-01
Abstract
Abstract An instrument useful in performing lumbar arthrodesis with a minimal approach which spares the lumbar muscles from surgical disruption and includes one of two retractor designs having blades angled approximately 90° with respect to each respective retractor handle. One blade is bent at an end portion thereof in a direction away from the handle portion. The other blade has first and second blade faces, with the second face having at least two toothed structures located thereon.
Inventors
- 👤 Stephen Ritland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A surgical retractor device for use with a rod implant, comprising: a handle and a blade, said blade angled with respect to said handle at approximately 90°, said blade having a depth ranging from 2-10 cm and having first and second faces, said first face being substantially perpendicular to said second face, said first face being angled approximately 90° with respect to said handle, and said second face having at least two toothed structures oriented co-planar with said second face and substantially perpendicular to said first face, said at least two toothed structures situated proximate two indentations, at least one of said two indentations sized for stabilizing the retractor against the rod implant, said at least two toothed structures and said indentations located along a forward projecting lateral edge of said second face.
Claim 2
Dependent Claim
133 words
A surgical retractor device for use with a rod implant, comprising: a handle and a blade, said blade angled with respect to said handle at approximately 90°, said blade having a depth ranging from 2-10 cm and having first and second faces, said first face being substantially perpendicular to said second face, said first face being angled approximately 90° with respect to said handle, and said second face having at least two toothed structures oriented co-planar with said second face and substantially perpendicular to said first face, said at least two toothed structures situated proximate two indentations, at least one of said two indentations sized for stabilizing the retractor against the rod implant, said at least two toothed structures and said indentations located along a forward projecting lateral edge of said second face.
Claim 3
Dependent Claim
30 words
The device as claimed in claim 1 , wherein said at least two toothed structures and said indentations are located along a lower portion of said forward projecting lateral edge.
Claim 4
Dependent Claim
16 words
The device as claimed in claim 1 , wherein said indentations are substantially semi-circular in shape.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-02-16 | 2007-08-18 | 2008-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-02-16 | 2011-08-18 | 2012-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-02-16 | 2015-08-18 | 2016-02-17 | $7700.00 | Window Closed / Lapsed |