US840457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-turbine.
Assignee: Individual
•
Filing: 1906-07-20
•
Granted: 1907-01-01
•
Expires: 1926-07-20
Abstract
No abstract record available.
Inventors
- 👤 Halbert Paul Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
F; F04; F04D; F04D5/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
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) | 1909-12-31 | 1910-07-02 | 1911-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-12-31 | 1914-07-02 | 1915-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-12-31 | 1918-07-02 | 1919-01-01 | $7700.00 | Window Closed / Lapsed |