US2515228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuating apparatus for highfrequency energy
Assignee: Unisys Corp
•
Filing: 1946-05-28
•
Granted: 1950-07-18
•
Expires: 1966-05-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph V Hupcey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1957538A
Cited
US2414785A
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US2399930A
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US2426992A
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US2401296A
Cited
US2452737A
Cited
US2409599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |