US2580678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency measuring apparatus
Assignee: Unisys Corp
•
Filing: 1943-09-17
•
Granted: 1952-01-01
•
Expires: 1963-09-17
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
- 👤 Moreno Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/04; G01R21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2329813A
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GB545936A
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US2323076A
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US2305952A
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US2314764A
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US2323128A
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US2365218A
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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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |