Patent US5873469A successfully refreshed from Google Patents.
Patent US4629461A successfully refreshed from Google Patents.
US4629461A
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US
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Posterior chamber intra-ocular lens
Assignee: Federal Patent Corp
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Filing: 1984-11-05
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Granted: 1986-12-16
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Expires: 2004-11-05
Abstract
Abstract A posterior chamber intra-ocular lens with a plurality of separated protrusions extending rearwardly from the lens to separate the optical portion from the posterior capsule. The protrusions may be integral with the lens body or formed as a separate element. The protrusions may be fixed in bore holes or mounted in a ring. Material more flexible and softer than the lens body such as silicone or HEMA can be used for the protrusions.
Inventors
- 👤 Henry Clayman
- 👤 James R. Longacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:05
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1602; A61F2/161; A61F2/16015; A61F2002/1681
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A posterior chamber intra-ocular lens for implantation in the eye comprising: a lens body having a central optical portion and an anterior and posterior surface; and a ring detachably fixed to the posterior surface of said lens body to extend about said central optical portion and having a plurality of separated and unconnected protrusions extending outwardly and rearwardly from said ring to contact the posterior capsule without puncturing the posterior capsule and space the capsule from the rest of said lens body and to permit fluid circulation between the rear surface of said central optic and the posterior capsule.
Claim 2
Dependent Claim
99 words
A posterior chamber intra-ocular lens for implantation in the eye comprising: a lens body having a central optical portion and an anterior and posterior surface; and a ring detachably fixed to the posterior surface of said lens body to extend about said central optical portion and having a plurality of separated and unconnected protrusions extending outwardly and rearwardly from said ring to contact the posterior capsule without puncturing the posterior capsule and space the capsule from the rest of said lens body and to permit fluid circulation between the rear surface of said central optic and the posterior capsule.
Claim 3
Dependent Claim
17 words
A lens as in claim 1 further including centering means forming appendages integral with said lens body.
Claim 4
Dependent Claim
12 words
A lens as in claim 2 wherein said appendages are haptic loops.
Claim 5
Dependent Claim
17 words
A lens as in claim 1 wherein said protrusions each extend outwardly between 0.1 and 1 mm.
Claim 6
Dependent Claim
16 words
A lens as in claim 4 wherein said protrusions extend outwardly between 0.2 and 0.5 mm.
Claim 7
Dependent Claim
19 words
A lens as in claim 1 wherein said central optical portion and said protrusions are formed of different material.
Claim 8
Dependent Claim
24 words
A lens as in claim 1 wherein said protrusions are of material softer and more flexible than the material of said central optical portion.
Claim 9
Dependent Claim
14 words
A lens as in claim 7 wherein said protrusions are formed of a hydrogel.
Claim 10
Dependent Claim
13 words
A lens as in claim 8 wherein said hydrogel is a hydrophillic polymer.
Claim 11
Dependent Claim
12 words
A lens as in claim 1 wherein said protrusions are of silicone.
Claim 12
Dependent Claim
12 words
A lens as in claim 1 wherein said lens body is plastic.
Claim 13
Dependent Claim
12 words
A lens as in claim 11 wherein said plastic is polymethyl methacrylate.
Claim 14
Dependent Claim
32 words
A lens as in claim 1 further including centering means forming integral and flexible extensions of said lens body in a direction substantially transverse to the direction in which said protrusions extend.
Claim 15
Dependent Claim
16 words
A lens as in claim 13 wherein said centering means and lens body are of plastic.
Claim 16
Dependent Claim
12 words
A lens as in claim 14 wherein said plastic is polymethyl methacrylate.
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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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |