US2729794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency apparatus
Assignee: Unisys Corp
•
Filing: 1950-10-20
•
Granted: 1956-01-03
•
Expires: 1970-10-20
Abstract
No abstract record available.
Inventors
- 👤 Seymour B Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:48
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/02; H01P1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2257783A
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US2540839A
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US2610249A
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US2505534A
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US2441598A
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US2514679A
Cited
GB592224A
Cited
US2479650A
Cited
US2597607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |