US2934723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuator
Assignee: AT&T Inc
•
Filing: 1956-10-24
•
Granted: 1960-04-26
•
Expires: 1976-10-24
Abstract
No abstract record available.
Inventors
- 👤 Jr William H Hewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:25
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB439457A
Cited
US2497094A
Cited
US2458579A
Cited
US2652535A
Cited
US2607031A
Cited
US2649574A
Cited
US2887665A
Cited
US2760163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |