US2685230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large aperture telephoto objective
Assignee: United States, WAR, Secretary of
•
Filing: 1947-11-06
•
Granted: 1954-08-03
•
Expires: 1967-11-06
Abstract
No abstract record available.
Inventors
- 👤 James G Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:31
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE471565C
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GB190604523A
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GB191307229A
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GB222709A
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US1791276A
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GB388215A
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US2378170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |