Patent US4764169A successfully refreshed from Google Patents.
US4764169A
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Intraocular lens
Assignee: Individual
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Filing: 1986-12-04
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Granted: 1988-08-16
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Expires: 2006-12-04
Abstract
Abstract A light weight intraocular lens for placement in a capsular bag, including a small hard inner lens optic and a soft pliable skirt surrounding the lens optic. The lens optic is a bi-convex optic. The lens optic is a high refractive index material and has a diameter of about 2-4 mm and utilizes a laser discussion yag space. The soft pliable skirt with an inner circumference channel secures about an edge of the lens optic and extends away at a downwardly sloping angle. The bottom edge of the skirt can be continuous or intermittent, and can include a single or dual ridge barrier. The outer diameter of the lens skirt can be up to 8-9 mm.
Inventors
- 👤 Dennis T. Grendahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:16
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2250/00; A61F2250/0014; A61F2250/0018
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
Intraocular lens, free of haptic loops, comprising: a. hard bi-convex lens optic of high refractive index material; and, b. channeled soft skirt surrounding the edge of said lens optic and of a foldable material, and angulated skirt edge means extending downwardly therefrom an upper surface of said skirt and forming a barrier ridge and forming two concentric rings which act as a dual barrier ridge.
Claim 2
Dependent Claim
65 words
Intraocular lens, free of haptic loops, comprising: a. hard bi-convex lens optic of high refractive index material; and, b. channeled soft skirt surrounding the edge of said lens optic and of a foldable material, and angulated skirt edge means extending downwardly therefrom an upper surface of said skirt and forming a barrier ridge and forming two concentric rings which act as a dual barrier ridge.
Claim 3
Dependent Claim
21 words
Lens of claim 1, wherein said material of said lens optic is PMMA, polysulfone, polycarbonate, or like high refractive index material.
Claim 4
Dependent Claim
16 words
Lens of claim 1, wherein said soft skirt is of silicone, hydrogel or like foldable material.
Claim 5
Dependent Claim
12 words
Lens of claim 1, wherein said center optic is 2-4 mm. diameter.
Claim 6
Dependent Claim
14 words
Lens of claim 1, wherein said skirt has an outer diameter of 6-9 mm.
Claim 7
Dependent Claim
11 words
Lens of claim 1, wherein said skirt thickness is 0.05-0.5 mm.
References Cited (Backward Citations)
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US4605409A
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |