Patent US3443864A successfully refreshed from Google Patents.
US3443864A
Expired / Lapsed
US
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Triplet-type projection lens
Assignee: Eastman Kodak Co
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Filing: 1967-01-23
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Granted: 1969-05-13
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Expires: 1987-01-23
Abstract
No abstract record available.
Inventors
- 👤 Muriel D Ackroyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:59
CPC Classifications
G; G02; G02B; G02B13/00; G02B9/00; G02B9/12; G02B9/14; G02B9/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736234A
Cited
US2453260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |