Patent US5336235A successfully refreshed from Google Patents.
US5336235A
Expired / Lapsed
US
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Keratome
Assignee: Individual
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Filing: 1991-07-23
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Granted: 1994-08-09
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Expires: 2011-07-23
Abstract
Abstract A keratome is disclosed for use in eye surgery. The keratome includes an elongated handle having two ends. A blade is secured to one end of the handle so that the blade has a cutting edge spaced from and facing outwardly from the end of the handle. The blade is curvilinear in shape and has a radius of curvature substantially the same as the radius of curvature of the eye immediately adjacent the outer periphery of the cornea of the eye.
Inventors
- 👤 William D. Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:20
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; A61F9/0133
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A keratome for use in eye surgery, said keratome comprising: an elongated handle having a longitudinal axis and two ends, a blade secured to one end of said handle, said blade having a left side edge, a right side edge and a thin walled body portion extending between said left side edge and said right side edge, said blade having a cutting edge spaced from and facing away from said one end of said handle, said cutting edge extending between said left side edge and said right side edge, said blade being curvilinear in shape along a plane substantially perpendicular to said blade so that said blade has a concave inner surface and a cylindrical convex outer surface, said blade having a radius of curvature about an axis substantially parallel to said longitudinal axis of said handle.
Claim 2
Dependent Claim
137 words
A keratome for use in eye surgery, said keratome comprising: an elongated handle having a longitudinal axis and two ends, a blade secured to one end of said handle, said blade having a left side edge, a right side edge and a thin walled body portion extending between said left side edge and said right side edge, said blade having a cutting edge spaced from and facing away from said one end of said handle, said cutting edge extending between said left side edge and said right side edge, said blade being curvilinear in shape along a plane substantially perpendicular to said blade so that said blade has a concave inner surface and a cylindrical convex outer surface, said blade having a radius of curvature about an axis substantially parallel to said longitudinal axis of said handle.
Claim 3
Dependent Claim
38 words
The invention as defined in claim 1 wherein said radius of curvature of said blade is substantially the same as a radius of curvature of a human eye adjacent an outer periphery of the cornea of the eye.
Claim 4
Dependent Claim
35 words
The invention as defined in claim 1 wherein said cutting edge of said blade is V-shaped, and wherein said left side edge and said right side edge extend from opposite sides of the cutting edge.
Claim 5
Dependent Claim
24 words
The invention as defined in claim 3 wherein said side edges extend in a direction substantially parallel to said longitudinal axis of said handle.
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) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |