US2779006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spurious mode suppressing wave guides
Assignee: AT&T Inc
•
Filing: 1951-10-10
•
Granted: 1957-01-22
•
Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Walter J Albersheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:27
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/02; H01P1/16; H01P1/163
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2088749A
Cited
FR869734A
Cited
US2395560A
Cited
US2465719A
Cited
US2512468A
Cited
US2464598A
Cited
US2511896A
Cited
US2556187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |