US2478778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable delay means
Assignee: AT&T Inc
•
Filing: 1944-08-01
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Granted: 1949-08-09
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Expires: 1964-08-01
Abstract
No abstract record available.
Inventors
- 👤 Bernard M Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S13/70; G01S7/00; G01S7/02; G01S7/03; G01S7/034; H; H03; H03K; H03K5/00; H03K5/159
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |