Patent US2409474A successfully refreshed from Google Patents.
US2409474A
Expired / Lapsed
US
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High-frequency attenuator and divider circuits
Assignee: Lanteris Space LLC
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Filing: 1943-05-13
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Granted: 1946-10-15
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Expires: 1963-05-13
Abstract
No abstract record available.
Inventors
- 👤 Richard G Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:16
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-10-14 | 1950-04-15 | 1950-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-14 | 1954-04-15 | 1954-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-14 | 1958-04-15 | 1958-10-15 | $7700.00 | Window Closed / Lapsed |