US2817994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial viewing apparatus
Assignee: SCANOPTIC Inc
•
Filing: 1954-10-18
•
Granted: 1957-12-31
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Franz F Ehrenhaft
- 👤 Rosin Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:30
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281772A
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US1217169A
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US1893542A
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US1783769A
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US2154454A
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US2162723A
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US2359032A
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US2335286A
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US2392436A
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US2464195A
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US2465957A
Cited
US2719470A
Cited
US2484537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |