Patent US2998752A successfully refreshed from Google Patents.
US2998752A
Expired / Lapsed
US
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Missile launching ramp
Assignee: Individual
•
Filing: 1952-03-08
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Granted: 1961-09-05
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Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
- 👤 Robert J Couts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:38
CPC Classifications
F; F41; F41F; F41F3/00; F41F3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US534651A
Cited
GB189425326A
Cited
US1558542A
Cited
US1706065A
Cited
US2549778A
Cited
US2481542A
Cited
US2591834A
Cited
US2604014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |