US3421067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charge controller utilizing coulometer
Assignee: United States Department of the Navy
•
Filing: 1966-06-24
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Granted: 1969-01-07
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Expires: 1986-06-24
Abstract
No abstract record available.
Inventors
- 👤 Louis Wilson
- 👤 Arthur F Hogrefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:05
CPC Classifications
G; G01; G01R; G01R22/00; G01R22/02; B; B64; B64G; B64G1/00; B64G1/22; B64G1/42; B64G1/425; B64G1/428; H; H02; H02J; H02J7/00; H02J7/90; H02J7/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3258670A
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US3255413A
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US3302091A
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US3343083A
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US3350618A
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US3321690A
Cited
US3329882A
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US3356922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |