US5258002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual tapered surgical knife
Assignee: Alcon Research LLC
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Filing: 1992-11-25
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Granted: 1993-11-02
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Expires: 2012-11-25
Abstract
Abstract A surgical knife having a handle and a blade, the blade having a blunt tip, a generally V-shaped cutting portion extending from the blunt tip to the widest part of the blade and tapered portion extending from the widest part of the blade to the point of attachment of the blade with the handle.
Inventors
- 👤 Mark J. Jeffers
- 👤 Michael S. O'Neil
- 👤 Luther A. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61F; A61F9/00; A61F9/007; A61F9/013; A61F9/0133
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
56 words
A surgical knife, comprising: a. a handle; and b. a blade attached to the handle having i) a dull, blunt tip, ii) a generally V-shaped cutting end with a pair of cutting edges, iii) a maximum width and iv) a dull tapered portion extending from the maximum width to a point of attachment with the handle.
Claim 2
Dependent Claim
56 words
A surgical knife, comprising: a. a handle; and b. a blade attached to the handle having i) a dull, blunt tip, ii) a generally V-shaped cutting end with a pair of cutting edges, iii) a maximum width and iv) a dull tapered portion extending from the maximum width to a point of attachment with the handle.
Claim 3
Dependent Claim
18 words
The surgical knife of claim 1 wherein the maximum width is approximately between 5.1 millimeters and 5.4 millimeters.
Claim 4
Dependent Claim
14 words
The surgical knife of claim 2 wherein the maximum width is approximately 5.30 millimeters.
Claim 5
Dependent Claim
12 words
The surgical knife of claim 1 wherein the blade comprises stainless steel.
Claim 6
Dependent Claim
11 words
The surgical knife of claim 1 wherein the blade comprises titanium.
Claim 7
Dependent Claim
12 words
The surgical knife of claim 1 wherein the handle comprises stainless steel.
Claim 8
Dependent Claim
11 words
The surgical knife of claim 1 wherein the handle comprises thermoplastic.
Claim 9
Dependent Claim
11 words
The surgical knife of claim 1 wherein the handle comprises aluminum.
Claim 10
Dependent Claim
68 words
A surgical knife, comprising: a. a handle; and b. a blade attached to the handle having i) a dull, blunt tip, ii) a generally V-shaped cutting portion with a pair of cutting edges. iii) a medial portion having a maximum width of approximately between 5.1 millimeters and 5.4 millimeters and iv) a dull tapered portion extending from the medial portion to a point of attachment with the handle.
Claim 11
Dependent Claim
68 words
A surgical knife, comprising: a. a handle; and b. a blade attached to the handle having i) a dull, blunt tip, ii) a generally V-shaped cutting portion with a pair of cutting edges. iii) a medial portion having a maximum width of approximately between 5.1 millimeters and 5.4 millimeters and iv) a dull tapered portion extending from the medial portion to a point of attachment with the handle.
Claim 12
Dependent Claim
14 words
The surgical knife of claim 9 wherein the maximum width is approximately 5.30 millimeters.
Claim 13
Dependent Claim
12 words
The surgical knife of claim 9 wherein the blade comprises stainless steel.
Claim 14
Dependent Claim
11 words
The surgical knife of claim 9 wherein the blade comprises titanium.
Claim 15
Dependent Claim
12 words
The surgical knife of claim 9 wherein the handle comprises stainless steel.
Claim 16
Dependent Claim
11 words
The surgical knife of claim 9 wherein the handle comprises thermoplastic.
Claim 17
Dependent Claim
11 words
The surgical knife of claim 9 wherein the handle comprises aluminum.
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) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-01 | 2001-05-03 | 2001-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-01 | 2005-05-03 | 2005-11-02 | $7700.00 | Window Closed / Lapsed |