Patent US3453527A successfully refreshed from Google Patents.
US3453527A
Expired / Lapsed
US
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Voltage regulators for use with generators having field windings
Assignee: ZF International UK Ltd
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Filing: 1966-08-17
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Granted: 1969-07-01
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Expires: 1986-08-17
Abstract
No abstract record available.
Inventors
- 👤 Roger William Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:09
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/30; H02P9/305; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/24; H02J7/243
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |