Patent US2780208A successfully refreshed from Google Patents.
US2780208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating engine
Assignee: Individual
•
Filing: 1953-06-23
•
Granted: 1957-02-05
•
Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:42
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/002; F02B33/00; F02B33/02; F02B33/06; F02B33/10; F02B33/14; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US519863A
Cited
AT6167B
Cited
US886846A
Cited
US955144A
Cited
US1099860A
Cited
US1651147A
Cited
US2147644A
Cited
US2309434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |