US2915637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning system for toroid inductors
Assignee: International Electronic Research Corp
•
Filing: 1953-11-30
•
Granted: 1959-12-01
•
Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 John C Mcadam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:45
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1896510A
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US2200263A
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US2380242A
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US2503155A
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US2611094A
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US2621314A
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US2802170A
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US2762020A
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |