US2602137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency converter apparatus
Assignee: Unisys Corp
•
Filing: 1946-10-29
•
Granted: 1952-07-01
•
Expires: 1966-10-29
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:31
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281935A
Cited
US2406370A
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US2190515A
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US2260844A
Cited
US2293151A
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US2411289A
Cited
US2403025A
Cited
US2409608A
Cited
US2410840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |