US2454846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier stack
Assignee: STC PLC
•
Filing: 1945-03-22
•
Granted: 1948-11-30
•
Expires: 1965-03-22
Abstract
No abstract record available.
Inventors
- 👤 Skinker Murray Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
H; H10; H10W; H10W90/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1763097A
Cited
US1649741A
Cited
GB290985A
Cited
US2042542A
Cited
US2058773A
Cited
US2170634A
Cited
US2184686A
Cited
US2156054A
Cited
GB503335A
Cited
US2314104A
Cited
US2261618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |