Patent US3283061A successfully refreshed from Google Patents.
US2777896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically loaded composite conductors
Assignee: AT&T Inc
•
Filing: 1951-06-29
•
Granted: 1957-01-15
•
Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Harold S Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/12; H01B11/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |