Patent US776658A successfully refreshed from Google Patents.
US776658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine.
Assignee: Individual
•
Filing: 1904-05-23
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Granted: 1904-12-06
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Expires: 1924-05-23
Abstract
No abstract record available.
Inventors
- 👤 Fred C Francisco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:12
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3441; F04C2/3443
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1907-12-06 | 1908-06-06 | 1908-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-12-06 | 1912-06-06 | 1912-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-12-06 | 1916-06-06 | 1916-12-06 | $7700.00 | Window Closed / Lapsed |