US3458870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial corneal implants having a removable lens member
Assignee: Individual
•
Filing: 1964-05-25
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Granted: 1969-08-05
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 William Stone Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:32
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/142; A61F2/145; A61F2/15; A61F2250/00; A61F2250/0058; A61F2250/0059; A61F2250/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
140 words
A CORNEAL IMPLANT OF THE TYPE THAT IS ADAPTED TO BE MARGINALLY LOCATED BETWEEN ANTERIOR AND POSTERIOR CORNEAL LAYERS, SAID IMPLANT INCLUDING A HOLDING MEMBER OF CONCAVO-CONVEX FORM HAVING AN OPENING EXTENDING THERETHROUGH A PLURALITY OF PASSAGES ADJACENT ITS PERIPHERY THROUGH WHICH CORNEAL STROMA MAY GROW AND BY SUCH GROWING PERMANENTLY ANCHOR THE IMPLANT, AND A LENS MEMBER REMOVABLY HELD IN SAID OPENING AND INCLUDING A HEAD OVERLYING THE HOLDING MEMBERR MARGINALLY OF SAID OPENING, ONE OF SAID MEMBERS HAVING IN THE ZONE WHERE SAID MEMBERS OVERLAP, PORTIONS ENGAGEABLE BY A TOOL FOR REMOVING SAID LENS MEMBER, EACH MEMBER BEING OF A MATERIAL INERT WITH RESPECT TO AQUEOUS HUMOR, AT LEAST THE PORTION OF THE HOLDING MEMBER PROVIDED WITH ANCHORING PASSAGES BEING SUFFICIENTLY INERT OT BE TOLERATED BY CORNEAL STROMA, AND THE LENS MEMBER BEING SUFFICIENTLY CLEAR FOR OPTICAL PURPOSES.
References Cited (Backward Citations)
US2714721A
Cited
US3074407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |