US3453564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously variable high-frequency transmission line attenuator using variably biased microwave diodes and method therefor
Assignee: Eaton Corp
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Filing: 1967-08-22
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Granted: 1969-07-01
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Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:07
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/24; H03H7/25; H03H7/253; H03H7/255; H03C; H03C7/00; H03C7/02; H03C7/025; H03C7/027; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |