US3211810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making a non-rotating corneal lens
Assignee: Individual
•
Filing: 1961-11-27
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Granted: 1965-10-12
•
Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Elmer L Gamber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:37
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF PRODUCING A NON-ROTATABLE CORNEAL CONTACT LENS OF THE TYPE HAVING A STOP FLANGE COMPRISING PROVIDING A CIRCULAR CONCAO-CONVEX LENS BODY FROM A TRANSPARENT THERMOPLASTIC MATERIAL, AND THEN FORMING A LOWER SEGMENT OF SAID LENS BODY INTO A STOP FLANGE BY APPLYING HEAT AND PRESSURE TO SAID SEGMENT WHILE ROTATING THE LENS FORWARDLY ABOUT THE HEATED SEGMENT SUCH AS TO BEND IT IN THE CONVEX DIRECTION OF THE LENS.
Claim 2
Independent Claim
71 words
A METHOD OF PRODUCING A NON-ROTATABLE CORNEAL CONTACT LENS OF THE TYPE HAVING A STOP FLANGE COMPRISING PROVIDING A CIRCULAR CONCAO-CONVEX LENS BODY FROM A TRANSPARENT THERMOPLASTIC MATERIAL, AND THEN FORMING A LOWER SEGMENT OF SAID LENS BODY INTO A STOP FLANGE BY APPLYING HEAT AND PRESSURE TO SAID SEGMENT WHILE ROTATING THE LENS FORWARDLY ABOUT THE HEATED SEGMENT SUCH AS TO BEND IT IN THE CONVEX DIRECTION OF THE LENS.
References Cited (Backward Citations)
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Cited
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Cited
US2653515A
Cited
US3013300A
Cited
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |