US2436834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase and frequency modulation
Assignee: Individual
•
Filing: 1942-11-17
•
Granted: 1948-03-02
•
Expires: 1962-11-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin K Stodola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:01
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/24; H03C3/38; H03C3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2143386A
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US2281935A
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US2231079A
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US2294372A
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US2321269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |