US158664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in rotary engines
Assignee: —
•
Filing: —
•
Granted: 1875-01-12
•
Expires: 1892-01-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:29
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/30; F01C1/40; F01C1/44; F01C1/34; F01C1/344; F01C1/3446; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827; F01C21/0836
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) | 1878-01-11 | 1878-07-13 | 1879-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1882-01-11 | 1882-07-13 | 1883-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1886-01-11 | 1886-07-13 | 1887-01-12 | $7700.00 | Window Closed / Lapsed |