Patent FR2275771B1 successfully refreshed from Google Patents.
US2473419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current rectifier
Assignee: Individual
•
Filing: 1946-01-14
•
Granted: 1949-06-14
•
Expires: 1966-01-14
Abstract
No abstract record available.
Inventors
- 👤 Albert C Fletcher
- 👤 Lloyd Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:24
CPC Classifications
H; H10; H10W; H10W90/00; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1323188A
Cited
GB318265A
Cited
US2046153A
Cited
US2133745A
Cited
US2134131A
Cited
US2205897A
Cited
US2172887A
Cited
US2157895A
Cited
US2302087A
Cited
US2221616A
Cited
US2309081A
Cited
GB556545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |