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Patent US663972A successfully refreshed from Google Patents.
US663972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-engine.
Assignee: Individual
•
Filing: 1900-05-31
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Granted: 1900-12-18
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Expires: 1920-05-31
Abstract
No abstract record available.
Inventors
- 👤 William Loeffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:42
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/084
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) | 1903-12-18 | 1904-06-18 | 1904-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-12-18 | 1908-06-18 | 1908-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-12-18 | 1912-06-18 | 1912-12-18 | $7700.00 | Window Closed / Lapsed |