Patent US3624969A successfully refreshed from Google Patents.
US3624969A
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US
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Lens generating apparatus
Assignee: American Optical Corp
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Filing: 1970-07-15
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Granted: 1971-12-07
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Expires: 1990-07-15
Abstract
Abstract GENERATING SURFACES OF OPHTHALMIC LENSES TO TRUE TORIC SHAPED USING A CUPPED GENERATING TOOL UNIVERSALLY ADAPTABLE TO THE PRODUCTION OF LENSES OF DIFFERENT REFRACTIVE POWERS.
Inventors
- 👤 Ernest T Dalton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:54
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/04; B24B13/043
Claims Analysis
Total Claims: 0
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |