US2393295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic materials
Assignee: AT&T Inc
•
Filing: 1942-10-09
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Granted: 1946-01-22
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Expires: 1962-10-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert P Cross
- 👤 Joy F Dillinger
- 👤 Arthur N Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:10
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/44; H01F1/447; C; C22; C22C; C22C14/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-01-21 | 1949-07-23 | 1950-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-21 | 1953-07-23 | 1954-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-21 | 1957-07-23 | 1958-01-22 | $7700.00 | Window Closed / Lapsed |