US2516765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracking control
Assignee: AT&T Inc
•
Filing: 1944-02-24
•
Granted: 1950-07-25
•
Expires: 1964-02-24
Abstract
No abstract record available.
Inventors
- 👤 Enoch B Ferrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/78; G01; G01S; G01S1/00; G01S1/02; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/422; G01S13/66; G01S13/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1547574A
Cited
US1703280A
Cited
US1554698A
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US1988458A
Cited
US1973279A
Cited
US2088654A
Cited
US2068490A
Cited
US2134901A
Cited
US2409970A
Cited
US2233415A
Cited
GB489271A
Cited
US2424568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |