Patent US3803560A successfully refreshed from Google Patents.
US457078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reheater for compound engines
Assignee: —
•
Filing: —
•
Granted: 1891-08-04
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Expires: 1908-08-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:45
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/0408; F28D1/0426; F28D1/0435
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) | 1894-08-03 | 1895-02-02 | 1895-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-08-03 | 1899-02-02 | 1899-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-08-04 | 1903-02-03 | 1903-08-05 | $7700.00 | Window Closed / Lapsed |