US2680209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency apparatus
Assignee: Unisys Corp
•
Filing: 1950-05-12
•
Granted: 1954-06-01
•
Expires: 1970-05-12
Abstract
No abstract record available.
Inventors
- 👤 Carol M Veronda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB606801A
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US2407707A
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US2413725A
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US2475652A
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US2422695A
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US2464349A
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US2399752A
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US2544675A
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US2466704A
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US2498673A
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US2469843A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |