Patent US1997685A successfully refreshed from Google Patents.
Patent US2486784A successfully refreshed from Google Patents.
US2486784A
Expired / Lapsed
US
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Telemetric system
Assignee: AT&T Inc
•
Filing: 1945-10-11
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Granted: 1949-11-01
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Expires: 1965-10-11
Abstract
No abstract record available.
Inventors
- 👤 William H T Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124684A
Cited
US2164412A
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US2179663A
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US2153986A
Cited
US2332523A
Cited
US2366603A
Cited
US2359866A
Cited
US2355685A
Cited
US2395477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |