US2651560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Observing apparatus, particularly for observing objects moving in space
Assignee: Rheinmetall Air Defence AG
•
Filing: 1947-12-29
•
Granted: 1953-09-08
•
Expires: 1967-12-29
Abstract
No abstract record available.
Inventors
- 👤 Gerber Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:57
CPC Classifications
F; F41; F41G; F41G5/00; F41G5/08; F41G3/00; F41G3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US838784A
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US1432570A
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US2340324A
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US2349506A
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US2497216A
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US2492745A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |