Patent US2369476A successfully refreshed from Google Patents.
Patent US2608395A successfully refreshed from Google Patents.
Patent US5729656A successfully refreshed from Google Patents.
Patent US5611033A successfully refreshed from Google Patents.
Patent US4030889A successfully refreshed from Google Patents.
Patent US226570A successfully refreshed from Google Patents.
US226570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermo-dynamic engine
Assignee: —
•
Filing: —
•
Granted: 1880-04-13
•
Expires: 1897-04-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:17
CPC Classifications
F; F02; F02C; F02C1/00; F02C1/04; F02C1/10
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) | 1883-04-13 | 1883-10-13 | 1884-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1887-04-13 | 1887-10-13 | 1888-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1891-04-13 | 1891-10-13 | 1892-04-13 | $7700.00 | Window Closed / Lapsed |