Patent US2811829A successfully refreshed from Google Patents.
US2811829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ram jet employing carbon layer of insulation for solid carbon propellant
Assignee: Individual
•
Filing: 1952-12-04
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Granted: 1957-11-05
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Expires: 1972-12-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Topinka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:25
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K7/105; Y; Y10; Y10S; Y10S60/00; Y10S60/917
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |