US5019081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminectomy surgical process
Assignee: Orthopedic Systems Inc
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Filing: 1986-12-10
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Granted: 1991-05-28
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Expires: 2006-12-10
Abstract
Abstract A microscopic lumber laminectomy surgical process and procedure which includes the steps of punching a hole in the supraspinous ligament, instead of removing the ligament, and of inserting a lamina spreader instrument through the hole and operating the spreader to open up the interspace between the lamina of the spinal column, with the ligament serving to stabilize the spine, and also serving to prevent the spreader from slipping out of the wound.
Inventors
- 👤 Robert S. Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/32053; A61B17/02; A61B17/025; A61B2017/0256; A61B17/28; A61B17/2812; A61B17/2833; A61B2017/2837
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
A laminectomy surgical process which involves the entrance into the interlaminal area of the spine, and which comprises the following steps: (a) punching a hole in the ligament covering the lamina of the spine; and (b) inserting a lamina spreader instrument through the hole in the ligament to engage and spread the lamina so as to open up the space there-between with the ligament in place, and with the ligament preventing any tendency for the instrument to slip out of the wound.
Claim 2
Dependent Claim
82 words
A laminectomy surgical process which involves the entrance into the interlaminal area of the spine, and which comprises the following steps: (a) punching a hole in the ligament covering the lamina of the spine; and (b) inserting a lamina spreader instrument through the hole in the ligament to engage and spread the lamina so as to open up the space there-between with the ligament in place, and with the ligament preventing any tendency for the instrument to slip out of the wound.
Claim 3
Dependent Claim
36 words
The process defined in claim 1, in which the spreader has a curved configuration so as to prevent any interference with the positioning of a microscope during microscopic laminectomy or with the surgeon during the procedure.
References Cited (Backward Citations)
US4034746A
Cited
SU787015A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |