Patent US2929010A successfully refreshed from Google Patents.
US2929010A
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US
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Differential ammeter for alternating current motors
Assignee: Individual
•
Filing: 1957-10-18
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Granted: 1960-03-15
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Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Earl B Lancaster
- 👤 Roy A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:55
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1334395A
Cited
US1942920A
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US2481500A
Cited
US2510930A
Cited
US2654860A
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US2762975A
Cited
US2829343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |