US680479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine.
Assignee: FRANCIS W GRIDLEY
•
Filing: 1899-10-09
•
Granted: 1901-08-13
•
Expires: 1919-10-09
Abstract
No abstract record available.
Inventors
- 👤 Peter English
- 👤 Luke Cooney Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:53
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/352
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1904-08-12 | 1905-02-11 | 1905-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-08-12 | 1909-02-11 | 1909-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-08-12 | 1913-02-11 | 1913-08-13 | $7700.00 | Window Closed / Lapsed |