US2523472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saturable reactor battery charger
Assignee: PROGRESSIVE WELDER Co
•
Filing: 1947-07-11
•
Granted: 1950-09-26
•
Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Chester F Leathers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:43
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J7/04; H02J7/12; H02J7/90; H02J7/933; Y; Y10; Y10S; Y10S320/00; Y10S320/22; Y10S320/24; Y10S320/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1284216A
Cited
US2018348A
Cited
US1993914A
Cited
US1965439A
Cited
US2040492A
Cited
US2085061A
Cited
US2083382A
Cited
US2125110A
Cited
GB515266A
Cited
US2272745A
Cited
GB535702A
Cited
US2346997A
Cited
US2334528A
Cited
US2311574A
Cited
US2373383A
Cited
US2423114A
Cited
US2383722A
Cited
US2378807A
Cited
US2390151A
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 |