Patent US2964719A successfully refreshed from Google Patents.
US2964719A
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US
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Electronically controlled microwave attenuator
Assignee: Individual
•
Filing: 1953-11-17
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Granted: 1960-12-13
•
Expires: 1973-11-17
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/222; H03; H03C; H03C7/00; H03C7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2577118A
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GB584942A
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US2532157A
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US2576186A
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US2505240A
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US2707235A
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US2507696A
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US2636926A
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US2707231A
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US2903652A
Cited
US2770784A
Cited
US2765445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |