US2599508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical bandpass network
Assignee: Sprague Electric Co
•
Filing: 1947-04-08
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Granted: 1952-06-03
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Expires: 1967-04-08
Abstract
No abstract record available.
Inventors
- 👤 William M Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:27
CPC Classifications
H; H03; H03H; H03H5/00; H03H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |