US2590282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable impedance device
Assignee: Stromberg Carlson Corp
•
Filing: 1947-11-08
•
Granted: 1952-03-25
•
Expires: 1967-11-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Moody C Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:11
CPC Classifications
H; H03; H03K; H03K7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1777410A
Cited
US1917394A
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US2266096A
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US2234461A
Cited
US2288375A
Cited
US2323598A
Cited
US2321269A
Cited
US2350171A
Cited
US2394933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |