US2757279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way communication systems
Assignee: Raytheon Co
•
Filing: 1951-11-20
•
Granted: 1956-07-31
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Expires: 1971-11-20
Abstract
No abstract record available.
Inventors
- 👤 Malcolm C Vosburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:37
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1784867A
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US2287925A
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US2333719A
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US2479701A
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US2486551A
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US2433290A
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US2547159A
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US2643329A
Cited
US2468029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |