US2725535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuators
Assignee: TDK Micronas GmbH
•
Filing: 1951-05-31
•
Granted: 1955-11-29
•
Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
- 👤 Herbert F Engelmann
- 👤 John A Kostriza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2464277A
Cited
US2409449A
Cited
US2538771A
Cited
US2611822A
Cited
US2515228A
Cited
US2567210A
Cited
US2670461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |