Patent US2947500A successfully refreshed from Google Patents.
US2947500A
Expired / Lapsed
US
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Rocket power plants for aircraft and the like
Assignee: Boelkow Entwicklungen KG
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Filing: 1957-04-05
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Granted: 1960-08-02
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Dreyer Kuno
- 👤 Wessel Wilhelm
- 👤 Bolkow Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:00
CPC Classifications
F; F42; F42B; F42B15/00; B; B64; B64C; B64C35/00; B64D; B64D27/00; B64D27/02; B64D27/023; F02; F02K; F02K9/00; F02K9/08; F02K9/30; F02K9/74; F02K9/76; F02K9/763; Y; Y02; Y02T; Y02T50/00; Y02T50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |