US2550344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally controlled battery charger
Assignee: STERLINGWORTH Co
•
Filing: 1949-10-31
•
Granted: 1951-04-24
•
Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 James B Godshalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:19
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J7/04; H02J7/06; H02J7/08; H02J7/60; H02J7/65; H02J7/90; H02J7/971; H02J7/975; H02J7/977
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |