US3461401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Klystron amplifier employing a long line feedback circuit to provide a stable high power microwave generator
Assignee: Varian Medical Systems Inc
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Filing: 1967-11-24
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Granted: 1969-08-12
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Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Norman H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:36
CPC Classifications
H; H03; H03L; H03L5/00; H03L5/02; H03B; H03B5/00; H03B5/18; H03B9/00; H03B9/01; H03B9/04; H03L7/00; H03L7/06; H03L7/08; H03L7/081; H03L7/0812
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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |