US3436639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage cut-off circuits
Assignee: Mcculloch Corp
•
Filing: 1967-03-06
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Granted: 1969-04-01
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Expires: 1987-03-06
Abstract
Abstract A voltage responsive cut-off circuit cuts off the charging current supplied to a battery by a variable direct-current source when the terminal voltage of the battery reaches a preselected value. The cut-off circuit is voltage-responsive and includes circuitry for limiting the current flow there through to prevent burning out the elements and further includes circuitry for bypassing the transient voltages so that the cut-off circuit will be responsive to the true direct-current voltage level across the battery.
Inventors
- 👤 Wilford B Burkett
- 👤 Robert V Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:45
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H02H9/041; H02J; H02J7/00; H02J7/02; H02J2207/00; H02J2207/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3260917A
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US3141124A
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US3217229A
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US3159755A
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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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |