US2840779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation
Assignee: Individual
•
Filing: 1953-09-22
•
Granted: 1958-06-24
•
Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Renaut Paul Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:13
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/34; G01N29/348; H; H03; H03C; H03C3/00; H03C3/10; H03C3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1972964A
Cited
US2137068A
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US2334018A
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US2522924A
Cited
US2551561A
Cited
US2768359A
Cited
US2731599A
Cited
US2730664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |