Patent US2223947A successfully refreshed from Google Patents.
Patent US5921998A successfully refreshed from Google Patents.
US5921998A
Expired / Lapsed
US
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Membrane eraser
Assignee: Synergetics Inc
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Filing: 1998-04-10
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Granted: 1999-07-13
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Expires: 2018-04-10
Abstract
Abstract An instrument for removing proliferative membranes in a treatment for proliferative vitreoretinal disorders includes an ophthalmic treatment tool for using in an ophthalmic surgery, the tool including: a grip portion; a rod-shaped body attached to one end of the grip portion; an elastic body fitted along a direction toward a front end of the rod-shaped body to the front end side of the rod-shaped body; and hard inorganic fine-grains or particles fixed on a tapered tip of the elastic body.
Inventors
- 👤 Yasuo Tano
- 👤 Motohiro Kamei
- 👤 Masato Ooji
- 👤 Yoshihiro Saitou
- 👤 Park In Won
- 👤 John M. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:06
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/013
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A membrane eraser used for ophthalmic surgery, comprising: a grip portion; a rod shaped body attached to one end of said grip portion; an elastic body fitted along a direction toward a front end of said rod-shaped body to the front end side thereof and having a hollow tapered front tip; and a plurality of hard, inorganic fine-grains fixed on said tapered front tip of said elastic body wherein said grains are located in a range of 0.5 mm to 3.0 mm from an end portion of said front tip for removal of membrane tissue on a retina of an individual.
Claim 2
Dependent Claim
101 words
A membrane eraser used for ophthalmic surgery, comprising: a grip portion; a rod shaped body attached to one end of said grip portion; an elastic body fitted along a direction toward a front end of said rod-shaped body to the front end side thereof and having a hollow tapered front tip; and a plurality of hard, inorganic fine-grains fixed on said tapered front tip of said elastic body wherein said grains are located in a range of 0.5 mm to 3.0 mm from an end portion of said front tip for removal of membrane tissue on a retina of an individual.
Claim 3
Dependent Claim
14 words
A membrane eraser according to claim 1, wherein said elastic body comprises silicone rubber.
Claim 4
Dependent Claim
24 words
A membrane eraser according to claim 1, wherein said hard inorganic fine-grains comprise grains having a range in diameter from 3 to 80 μm.
Claim 5
Dependent Claim
15 words
A membrane eraser according to claim 1, wherein said hard inorganic fine-grains comprise diamond particles.
Claim 6
Dependent Claim
13 words
A membrane eraser according to claim 1, wherein said rod-shaped body comprises titanium.
Claim 7
Dependent Claim
23 words
A membrane eraser according to claim 1, wherein said hard inorganic fine-grains are fixed by a silicone base adhesive to said front tip.
References Cited (Backward Citations)
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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) | 2002-07-12 | 2003-01-11 | 2003-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-12 | 2007-01-11 | 2007-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-12 | 2011-01-11 | 2011-07-13 | $7700.00 | Window Closed / Lapsed |