Patent US5639008A successfully refreshed from Google Patents.
US5639008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anvil for circular stapler
Assignee: United States Surgical Corp
•
Filing: 1996-02-09
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Granted: 1997-06-17
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Expires: 2016-02-09
Abstract
Abstract An anvil assembly for a surgical fastening instrument is disclosed. The anvil is constructed to pivot relative to an anvil shaft to facilitate movement of the anvil and instrument during use. The anvil also has an improved surface for severing structures and a sloped surface for guiding a knife during use.
Inventors
- 👤 Richard J. Gallagher
- 👤 David N. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:31
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/11; A61B17/115; A61B17/1155; A61B2017/00477; A61B17/068; A61B17/072; A61B2017/07214; A61B2017/07257
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
In an anvil assembly for a circular stapling instrument, the anvil assembly having an anvil member with an annular staple forming surface and an annular array of staple forming buckets formed in the staple forming surface, and a shaft having a longitudinal axis extending from the anvil member in a direction substantially perpendicular with respect to the staple forming surface, the improvement comprising: a sloped annular surface portion disposed adjacent to and radially inward of the staple forming surface, the sloped annular surface portion sloping radially inwardly and distally from the staple forming surface.
Claim 2
Dependent Claim
94 words
In an anvil assembly for a circular stapling instrument, the anvil assembly having an anvil member with an annular staple forming surface and an annular array of staple forming buckets formed in the staple forming surface, and a shaft having a longitudinal axis extending from the anvil member in a direction substantially perpendicular with respect to the staple forming surface, the improvement comprising: a sloped annular surface portion disposed adjacent to and radially inward of the staple forming surface, the sloped annular surface portion sloping radially inwardly and distally from the staple forming surface.
Claim 3
Dependent Claim
12 words
The anvil assembly according to claim 1, wherein the shaft is solid.
Claim 4
Dependent Claim
12 words
The anvil assembly according to claim 1, wherein the shaft is hollow.
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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) | 2000-06-16 | 2000-12-16 | 2001-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-16 | 2004-12-16 | 2005-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-16 | 2008-12-16 | 2009-06-17 | $7700.00 | Window Closed / Lapsed |