US2431707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging apparatus
Assignee: Individual
•
Filing: 1945-07-06
•
Granted: 1947-12-02
•
Expires: 1965-07-06
Abstract
No abstract record available.
Inventors
- 👤 Merlin L Pugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:14
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/92; H02J7/02; H02J7/60; H02J7/80; H02J7/82; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1879530A
Cited
GB445336A
Cited
US2246163A
Cited
US2354877A
Cited
US2347452A
Cited
US2366505A
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 |