Patent US4315337A successfully refreshed from Google Patents.
US4315337A
Expired / Lapsed
US
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Autoclavable anterior chamber implant
Assignee: Individual
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Filing: 1980-07-24
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Granted: 1982-02-16
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Expires: 2000-07-24
Abstract
Abstract The invention relates to anterior chamber implants of the type having a haptic with feet resting on the anterior surface of the iris. To enable the implant to be autoclaved, the optic is made of glass and the haptic is separately formed from an autoclavable inert material. Titanium and a polyethersulphone thermoplastic material are disclosed as suitable materials for the haptic.
Inventors
- 👤 David P. Choyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:57
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1602; A61F2/1605; A61F2002/1681; A61F2002/1683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
In an anterior chamber implant comprising an optic to act as an artificial lens and a haptic to support the optic within the anterior chamber at a distance from the iris to avoid blockage of the pupil, the haptic including feet lying in a plane parallel to and spaced from the optic to rest on the anterior surface of the iris in use and being so shaped as to minimize obstruction to circulation of fluids within the anterior chamber of the eye, the improvement wherein the optic is made of glass and the haptic is separately formed from a high temperature thermoplastic material comprising a polyethersulphone capable of being autoclaved and clinically inert to the fluids in the anterior chamber of the eye, the haptic being formed with a lens mount portion for receiving and supporting the lens and inclined intermediate portion extending between the lens mount portion and the feet, and wherein the optic is secured to the haptic by the use of a solvent adhesive.
Claim 2
Dependent Claim
167 words
In an anterior chamber implant comprising an optic to act as an artificial lens and a haptic to support the optic within the anterior chamber at a distance from the iris to avoid blockage of the pupil, the haptic including feet lying in a plane parallel to and spaced from the optic to rest on the anterior surface of the iris in use and being so shaped as to minimize obstruction to circulation of fluids within the anterior chamber of the eye, the improvement wherein the optic is made of glass and the haptic is separately formed from a high temperature thermoplastic material comprising a polyethersulphone capable of being autoclaved and clinically inert to the fluids in the anterior chamber of the eye, the haptic being formed with a lens mount portion for receiving and supporting the lens and inclined intermediate portion extending between the lens mount portion and the feet, and wherein the optic is secured to the haptic by the use of a solvent adhesive.
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) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |