US2852916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas producing apparatus especially for rocket type propulsion devices
Assignee: Napier Turbochargers Ltd
•
Filing: 1955-05-13
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Granted: 1958-09-23
•
Expires: 1975-05-13
Abstract
No abstract record available.
Inventors
- 👤 Hearn Francis John
- 👤 Shirley Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:27
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/46; F02K9/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402826A
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US2573471A
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US2697482A
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US2671312A
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US2763126A
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US2701441A
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US2668415A
Cited
US2694290A
Cited
US2785532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |