US3389324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated battery chargers
Assignee: CHARGEMATIC Inc
•
Filing: 1965-05-26
•
Granted: 1968-06-18
•
Expires: 1985-05-26
Abstract
No abstract record available.
Inventors
- 👤 Gray C Ballman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:21
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/60; H02J7/68; H02J7/02; H02J2207/00; H02J2207/20; Y; Y10; Y10S; Y10S320/00; Y10S320/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |