US2820201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective transfer device for microwave energy
Assignee: Unisys Corp
•
Filing: 1951-02-28
•
Granted: 1958-01-14
•
Expires: 1971-02-28
Abstract
No abstract record available.
Inventors
- 👤 Tomiyasu Kiyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:40
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2660706A
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US2544715A
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US2579327A
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US2472785A
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US2541910A
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US2591980A
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US2568090A
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US2702884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |