US3491692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage rocket
Assignee: Bolkow GmbH
•
Filing: 1968-01-26
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Granted: 1970-01-27
•
Expires: 1988-01-26
Abstract
No abstract record available.
Inventors
- 👤 Hans-Jurgen Blankenagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/02; F42B10/12; F42B15/00; F42B15/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2332980A
Cited
US3167016A
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US3026772A
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US3086467A
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US3186302A
Cited
US3177809A
Cited
US3285175A
Cited
US3377952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |