US2587055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cavity resonator for microwaves
Assignee: AT&T Inc
•
Filing: 1946-12-06
•
Granted: 1952-02-26
•
Expires: 1966-12-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:56
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2151118A
Cited
US2088749A
Cited
US2281550A
Cited
US2267289A
Cited
US2261130A
Cited
US2293839A
Cited
US2396044A
Cited
US2439388A
Cited
US2434508A
Cited
US2416168A
Cited
US2427107A
Cited
US2429601A
Cited
US2413939A
Cited
US2423390A
Cited
US2500417A
Cited
US2414456A
Cited
US2527619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |