US2611118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trickle charger
Assignee: Willard Storage Battery Co
•
Filing: 1947-11-22
•
Granted: 1952-09-16
•
Expires: 1967-11-22
Abstract
No abstract record available.
Inventors
- 👤 Howard T Havlick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:22
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1094733A
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US1543671A
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US1772133A
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US1771330A
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GB269650A
Cited
US1952974A
Cited
US1829603A
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US1852893A
Cited
US2367905A
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US2482509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |