Patent US3921500A successfully refreshed from Google Patents.
US767689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-turbine.
Assignee: Individual
•
Filing: 1903-06-13
•
Granted: 1904-08-16
•
Expires: 1923-06-13
Abstract
No abstract record available.
Inventors
- 👤 Per Johan Hedlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:43
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D5/142
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) | 1907-08-16 | 1908-02-15 | 1908-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-08-16 | 1912-02-15 | 1912-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-08-16 | 1916-02-15 | 1916-08-16 | $7700.00 | Window Closed / Lapsed |