US3457494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulation with correction speed proportional to error
Assignee: Landis and Gyr Metering Inc
•
Filing: 1966-07-05
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Granted: 1969-07-22
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Harley L Friend
- 👤 Robert L Cattell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14; G05F1/147; G05F1/153; G01; G01R; G01R1/00; G01R1/30; G01R35/00; G01R35/04
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |