US2958055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonreciprocal wave transmission
Assignee: AT&T Inc
•
Filing: 1956-03-02
•
Granted: 1960-10-25
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 John H Rowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:50
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2511610A
Cited
US2769148A
Cited
US2784378A
Cited
US2743322A
Cited
US2849684A
Cited
US2849686A
Cited
US2817813A
Cited
US2820720A
Cited
US2820200A
Cited
US2776412A
Cited
US2834947A
Cited
US2846655A
Cited
US2883629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |