Patent US2420957A successfully refreshed from Google Patents.
Patent US4725278A successfully refreshed from Google Patents.
US4725278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intraocular lens
Assignee: Individual
•
Filing: 1987-01-27
•
Granted: 1988-02-16
•
Expires: 2007-01-27
Abstract
Abstract An improved intraocular lens comprises a plurality of lens segments secured in a flexible and distortable frame member whereby the lens may be temporarily folded for insertion into the eye through a relatively small corneal incision. The preferred lens segments have a thickness of about 1.0 mm or less and comprise an optical material having an index of refraction of 1.5 or more.
Inventors
- 👤 Steven P. Shearing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2002/1681; A61F2002/1683
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
An intraocular lens comprising an optical lens body having an anterior and a posterior surface and comprising a plurality of lens segments, and a thin sheet of flexible optical material secured to a single surface of said lens body and overlying and secured to each of said segments and wherein said sheet of optical material does not extend substantially beyond the peripheral edge of said lens body.
Claim 2
Dependent Claim
67 words
An intraocular lens comprising an optical lens body having an anterior and a posterior surface and comprising a plurality of lens segments, and a thin sheet of flexible optical material secured to a single surface of said lens body and overlying and secured to each of said segments and wherein said sheet of optical material does not extend substantially beyond the peripheral edge of said lens body.
Claim 3
Dependent Claim
14 words
The lens of claim 1 wherein the optical sheet material comprises a silicone polymer.
Claim 4
Dependent Claim
21 words
The lens of claim 1 wherein said sheet of optical material is secured to the posterior surface of said lens body.
Claim 5
Dependent Claim
22 words
The lens of claim 1 wherein the lens body comprises an optical material having an index of refraction greater than about 1.5.
Claim 6
Dependent Claim
20 words
The lens of claim 4 wherein said lens body material is selected from the group consisting of polysulfone and glass.
Claim 7
Dependent Claim
29 words
The lens of claim 3 wherein said lens body is convex shaped and comprises three segments, the center segment having a maximum thickness no greater than about 1.0 mm.
Claim 8
Dependent Claim
22 words
The lens of claim 6 wherein the lens body comprises an optical material having an index of refraction greater than about 1.5.
Claim 9
Dependent Claim
20 words
The lens of claim 7 wherein said lens body material is selected from the group consisting of polysulfone and glass.
References Cited (Backward Citations)
US4439873A
Cited
US4608049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |