US2518225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency resistor
Assignee: Sprague Electric Co
•
Filing: 1946-07-03
•
Granted: 1950-08-08
•
Expires: 1966-07-03
Abstract
No abstract record available.
Inventors
- 👤 Stanley O Dorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:48
CPC Classifications
H; H01; H01C; H01C3/00; H01C3/02; H01G; H01G4/00; H01G4/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1026377A
Cited
GB220785A
Cited
US1881444A
Cited
US2111710A
Cited
US2251631A
Cited
US2403349A
Cited
US2457212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |