US2841775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency responsive systems
Assignee: Raytheon Co
•
Filing: 1950-05-25
•
Granted: 1958-07-01
•
Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 Norman B Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:27
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01S15/60; G01S11/00; G01S11/02; G01S11/10; Y; Y10; Y10S; Y10S367/00; Y10S367/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1471547A
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US1864638A
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US2274262A
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US2193371A
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US2480646A
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US2462630A
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US2621243A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |