US2912695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated wave guide devices
Assignee: AT&T Inc
•
Filing: 1953-09-30
•
Granted: 1959-11-10
•
Expires: 1973-09-30
Abstract
No abstract record available.
Inventors
- 👤 Cassius C Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:04
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01J; H01J25/00; H01J25/74; H01J25/78; H01P1/00; H01P1/02; H01P1/16; H01P1/18; H01P1/182; H01P1/20; H01P1/207; H01P1/211; H01P1/24; H01P1/28; H01P3/00; H01P3/10; H01P3/12; H01Q; H01Q13/00; H01Q13/02; H01Q13/0208; H01Q13/20; H01Q13/24; H01Q13/28; H01Q25/00; H01Q25/04; H04; H04B; H04B3/00; H04B3/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2432093A
Cited
US2438119A
Cited
US2567748A
Cited
US2422184A
Cited
US2474137A
Cited
US2453414A
Cited
US2388906A
Cited
US2460090A
Cited
US2659054A
Cited
US2623121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |