US2863042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Echo transmitter and receiver having means to produce stable intermediate frequency despite transmitter frequency drift
Assignee: Raytheon Co
•
Filing: 1956-08-09
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Granted: 1958-12-02
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Expires: 1976-08-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Royden C Sanders
- 👤 William R Mercer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:15
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50; G; G01; G01S; G01S1/00; G01S1/02; G01S7/00; G01S7/02; G01S7/03; G01S7/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2519369A
Cited
US2705752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |