US3943931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Goniolens
Assignee: Individual
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Filing: 1974-11-04
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Granted: 1976-03-16
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Expires: 1994-11-04
Abstract
Abstract A goniolens is defined as an oblique-truncated cylinder. The base of the cylinder has a concave surface to ensure complete contact thereof with the cornea of the eye. The truncated surface of the cylinder is convex and its curvature radius is equal to 8.5 mm. The angle confined by a planes of the concave and convex surfaces ranges from 20° to 60°, which makes it possible to focus the laser beam in the corner of the anterior segment of the eye during laser goniopuncture.
Inventors
- 👤 Mikhail Mikhailovich Krasnov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/008; A61F9/009; A61B; A61B3/00; A61B3/10; A61B3/117; A61F2009/00861; A61F2009/00868; A61F2009/00885; A61F2009/00891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A convex-concave contact lens with converging optical surfaces for use in laser microsurgery of the eye, said lens having a concave surface of a curvature radius to ensure complete contact thereof with the cornea of the eye and a truncated convex surface of a curvature radius equal to 8.5 mm, the angle confined by the planes of the concave and convex surfaces ranging from 20° to 60°, whereby it is possible to focus a laser beam through said lens in the corner of the anterior segment of the eye during laser goniopuncture.
Claim 2
Dependent Claim
92 words
A convex-concave contact lens with converging optical surfaces for use in laser microsurgery of the eye, said lens having a concave surface of a curvature radius to ensure complete contact thereof with the cornea of the eye and a truncated convex surface of a curvature radius equal to 8.5 mm, the angle confined by the planes of the concave and convex surfaces ranging from 20° to 60°, whereby it is possible to focus a laser beam through said lens in the corner of the anterior segment of the eye during laser goniopuncture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |