US2416329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull modulation system
Assignee: STC PLC
•
Filing: 1942-08-24
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Granted: 1947-02-25
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Expires: 1962-08-24
Abstract
No abstract record available.
Inventors
- 👤 Labin Emile
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:29
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/62; D06P1/621; D06P1/622; D06P1/625; H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2215776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |