Patent US2709887A successfully refreshed from Google Patents.
US2709887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zonal spray combustion chamber for rockets and rocket craft
Assignee: DANIEL AND FLORENCE GUGGENHEIM
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Filing: 1950-05-25
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Granted: 1955-06-07
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Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:45
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/52; Y; Y10; Y10S; Y10S60/00; Y10S60/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2217649A
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US2395406A
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US2381803A
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US2482260A
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US2508590A
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US2417445A
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US2510571A
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US2606421A
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US2591422A
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US2633706A
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US2526223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |