Patent US2953644A successfully refreshed from Google Patents.
US2953644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave transmission system
Assignee: AT&T Inc
•
Filing: 1956-10-04
•
Granted: 1960-09-20
•
Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:39
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2113214A
Cited
US2250862A
Cited
US2474244A
Cited
US2413593A
Cited
US2462874A
Cited
US2591264A
Cited
US2644084A
Cited
US2686259A
Cited
AT179317B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |