US2981885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saturable measuring device and magnetic core therefor
Assignee: Individual
•
Filing: 1958-07-21
•
Granted: 1961-04-25
•
Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Erick O Schonstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:58
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04; G01R33/05; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US499852A
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US1093258A
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US2277474A
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US2386753A
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GB592241A
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US2432514A
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US2438146A
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US2856581A
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US2872653A
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US2890426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |