US2911554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reciprocal wave transmission device
Assignee: AT&T Inc
•
Filing: 1953-06-17
•
Granted: 1959-11-03
•
Expires: 1973-06-17
Abstract
No abstract record available.
Inventors
- 👤 Kompfner Rudolf
- 👤 Suhl Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:17
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/36; H01P1/365; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2188579A
Cited
US2300052A
Cited
US2305884A
Cited
US2636948A
Cited
US2602148A
Cited
US2616990A
Cited
US2660689A
Cited
US2720609A
Cited
US2644930A
Cited
US2829300A
Cited
US2798203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |