Patent US3045542A successfully refreshed from Google Patents.
US3045542A
Expired / Lapsed
US
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Projection system corrected for marginal distortion
Assignee: Bausch and Lomb Inc
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Filing: 1959-04-22
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Granted: 1962-07-24
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Expires: 1979-04-22
Abstract
No abstract record available.
Inventors
- 👤 Nisson A Finkelstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:49
CPC Classifications
G; G03; G03B; G03B37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1283676A
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US1753222A
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US2792746A
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US2795996A
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US2890622A
Cited
US2828670A
Cited
US2780140A
Cited
FR1145367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |