US2829300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave device
Assignee: AT&T Inc
•
Filing: 1951-08-15
•
Granted: 1958-04-01
•
Expires: 1971-08-15
Abstract
No abstract record available.
Inventors
- 👤 James R Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
H; H01; 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)
US789738A
Cited
US995588A
Cited
US2110911A
Cited
US2567748A
Cited
US2394474A
Cited
US2441863A
Cited
US2457212A
Cited
US2584802A
Cited
US2540560A
Cited
US2611101A
Cited
US2541843A
Cited
US2579630A
Cited
US2652513A
Cited
US2760112A
Cited
US2636148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |