Patent US2425400A successfully refreshed from Google Patents.
US2425400A
Expired / Lapsed
US
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High aperture collimating lens system
Assignee: Eastman Kodak Co
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Filing: 1943-11-27
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Granted: 1947-08-12
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Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 Schade Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:00
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1476717A
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US1539579A
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US1610532A
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US1910115A
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FR679047A
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US1897262A
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US2003881A
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US2050024A
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US2206155A
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US2324081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |