US2431994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for transforming and converting electric power
Assignee: Individual
•
Filing: 1943-01-21
•
Granted: 1947-12-02
•
Expires: 1963-01-21
Abstract
No abstract record available.
Inventors
- 👤 Dibrell James Wendell
- 👤 Jr Fennell Dibrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1364129A
Cited
US1438976A
Cited
US1866679A
Cited
US1967303A
Cited
US2035125A
Cited
US2315445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |