US2523993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current to three-phase alternating current converter
Assignee: Individual
•
Filing: 1947-07-25
•
Granted: 1950-09-26
•
Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Mccandless William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:44
CPC Classifications
G; G01; G01P; G01P1/00; G01P1/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US885394A
Cited
US899629A
Cited
US919776A
Cited
US986299A
Cited
US1623562A
Cited
GB124407A
Cited
US1670836A
Cited
DE498912C
Cited
US1933086A
Cited
US2042334A
Cited
US2273848A
Cited
US2377284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |