Patent US2583564A successfully refreshed from Google Patents.
US2583564A
Expired / Lapsed
US
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Barrel engine
Assignee: Individual
•
Filing: 1948-08-19
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Granted: 1952-01-29
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Expires: 1968-08-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin S Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0002; F01B3/0005; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06; F02B75/26
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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |