US2467101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic core
Assignee: AT&T Inc
•
Filing: 1942-03-07
•
Granted: 1949-04-12
•
Expires: 1962-03-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:01
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; H01F1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1826711A
Cited
US1975750A
Cited
US1896040A
Cited
US2076230A
Cited
GB443552A
Cited
US2074782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-11 | 1952-10-11 | 1953-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-11 | 1956-10-11 | 1957-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-11 | 1960-10-11 | 1961-04-12 | $7700.00 | Window Closed / Lapsed |