Patent US2963823A successfully refreshed from Google Patents.
US2963823A
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Method for making fused multifocal lenses
Assignee: Bausch and Lomb Inc
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Filing: 1956-03-30
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Granted: 1960-12-13
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Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 Lewis P Ohliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:03
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733167A
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US1954353A
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US1996442A
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US2169194A
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US2462020A
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US2704420A
Cited
US2808448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |