Patent US3698802A successfully refreshed from Google Patents.
US3698802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic contact lens
Assignee: HENRY J BARON
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Filing: 1969-12-29
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Granted: 1972-10-17
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Expires: 1989-12-29
Abstract
Abstract A contact lens for use on a human eye formed from a gel-like hydrophilic polymeric material. The lens has a generally spherical concave inner surface which conforms to the curved surface of the cornea when positioned thereon and an outer peripheral surface portion tapering from a thin edge to an intermediate point of maximum thickness and then tapering to the center of the lens.
Inventors
- 👤 Henry J Baron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:44
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A contact lens as claimed in claim 1, in which the lens is of the corneal type with a diameter approximating the diameter of the cornea of the wearer.
Claim 2
Dependent Claim
39 words
A contact lens as claimed in claim 1, in which the lens is of the scleral type with a diameter larger than the cornea of the wearer and in which the lens extends beyond the area of the limbus.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |