Patent US2431312A successfully refreshed from Google Patents.
US2431312A
Expired / Lapsed
US
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Battery charging control system
Assignee: International Standard Electric Corp
•
Filing: 1944-12-06
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Granted: 1947-11-25
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Expires: 1964-12-06
Abstract
No abstract record available.
Inventors
- 👤 Cronvall Lars Per
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
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
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |