US3610246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical knife blade
Assignee: Individual
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Filing: 1969-09-18
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Granted: 1971-10-05
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Expires: 1989-09-18
Abstract
Abstract A surgical knife blade having a head portion provided with a generally hook-shaped cutting edge on a front edge, and sidewise protuberances behind the cutting edge, the blade being constructed to cut a membrane with a cut edge of the membrane riding on the protuberances as the cut advances.
Inventors
- 👤 James H Salmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61B17/3213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A surgical knife blade which comprises a head portion, a generally hook-shaped cutting edge on a front edge of the head portion, and sidewise protuberances on opposite sides of the head portion behind the cutting edge, the blade being of uniform thickness except at the protuberances, the blade being constructed to cut a membrance with cut edges of the membrane riding on the protuberances as the cut advances, the lower end of the blade terminating in a flat bearing face provided with a point at one end thereof and a rounded foot at the other end thereof, the point being at a bottom end of the cutting edge, the protuberances being adjacent and spaced above the rounded foot.
Claim 2
Dependent Claim
118 words
A surgical knife blade which comprises a head portion, a generally hook-shaped cutting edge on a front edge of the head portion, and sidewise protuberances on opposite sides of the head portion behind the cutting edge, the blade being of uniform thickness except at the protuberances, the blade being constructed to cut a membrance with cut edges of the membrane riding on the protuberances as the cut advances, the lower end of the blade terminating in a flat bearing face provided with a point at one end thereof and a rounded foot at the other end thereof, the point being at a bottom end of the cutting edge, the protuberances being adjacent and spaced above the rounded foot.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |