US2897352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System using magnetized controllable inductor operated stepwise to control frequency and the like
Assignee: Cgs Lab Inc
•
Filing: 1954-08-16
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Granted: 1959-07-28
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Smith-Vaniz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:24
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/14; H03J7/00; H03J7/18; H03J7/20; H03J7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |