Patent US2498677A successfully refreshed from Google Patents.
US2498677A
Expired / Lapsed
US
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Communication of intelligence
Assignee: STC PLC
•
Filing: 1945-06-19
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Granted: 1950-02-28
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Expires: 1965-06-19
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1712993A
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US1564627A
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US1673002A
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US1678163A
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US1699570A
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US2086601A
Cited
US2338412A
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US2285044A
Cited
US2340429A
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US2419547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |