US4242761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intraocular lens with threadably locked retention loops
Assignee: Johnson and Johnson Surgical Vision Inc
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Filing: 1979-07-25
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Granted: 1981-01-06
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Expires: 1999-07-25
Abstract
Abstract An optical section of an intraocular lens has a pair of spaced apart threaded recesses which are threadingly locked to threaded shank sections of an iris retention loop. The shank sections are integrally joined to such loop so each shank section acts as an anchor preventing a screwing movement of the other shank relative to the optical section. A method is described of expanding a shank section of a lens retention member in situ within a threaded or other undercut recess of an optical section of an intraocular lens.
Inventors
- 👤 Charles P. Chase
- 👤 Richard B. MacAnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2002/1681; A61F2002/1683; A61F2002/1686; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
An intraocular lens comprising: an optical section with a pair of spaced apart threaded recesses; and a retention loop with a pair of integral spaced apart threaded shank sections that extend into the recesses and threadingly lock the retention loop to the optical section, said shank sections forming with the loop a unitary one-piece construction.
Claim 2
Dependent Claim
55 words
An intraocular lens comprising: an optical section with a pair of spaced apart threaded recesses; and a retention loop with a pair of integral spaced apart threaded shank sections that extend into the recesses and threadingly lock the retention loop to the optical section, said shank sections forming with the loop a unitary one-piece construction.
Claim 3
Dependent Claim
18 words
A lens as set forth in claim 1, wherein the threaded recesses extend completely through the optical section.
Claim 4
Dependent Claim
17 words
A lens as set forth in claim 1, wherein the shank sections have in situ formed threads.
Claim 5
Dependent Claim
20 words
A lens as set forth in claim 3, wherein the loop and integral shank sections are of a thermoplastic material.
Claim 6
Dependent Claim
24 words
A lens as set forth in claim 3, wherein the retention loop and integral shank sections are polypropylene and the optical section is polymethylmethacrylate.
Claim 7
Dependent Claim
36 words
A lens as set forth in claim 1, wherein the retention loop is sufficiently stiff so that each shank section acts as an anchor preventing screwing motion of the other shank relative to the optical section.
Claim 8
Dependent Claim
38 words
A lens as set forth in claim 1, wherein the threaded recesses each have a pretapped diameter of from 0.004 to 0.020 inch (0.10 to 0.51 mm), and have from 100 to 300 threads/inch (3.9 to 12 threads/mm).
Claim 9
Dependent Claim
36 words
A lens as set forth in claim 1, wherein there are a plurality of retention loops, each with a pair of integral shank sections threadingly locked into threaded recesses of the optical section of the lens.
References Cited (Backward Citations)
US3991426A
Cited
US3994027A
Cited
US3996626A
Cited
US4104339A
Cited
US4012823A
Cited
US4139915A
Cited
US4166293A
Cited
US4159546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |