US2653448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated pressure air-driven power plant
Assignee: Individual
•
Filing: 1949-05-18
•
Granted: 1953-09-29
•
Expires: 1969-05-18
Abstract
No abstract record available.
Inventors
- 👤 John J Kupka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:49
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1091703A
Cited
US732892A
Cited
US990231A
Cited
US1753190A
Cited
US2135547A
Cited
US2298625A
Cited
US2354932A
Cited
US2421387A
Cited
US2438834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |