US3460074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for very short electromagnetic waves
Assignee: Siemens AG
•
Filing: 1965-07-20
•
Granted: 1969-08-05
•
Expires: 1985-07-20
Abstract
No abstract record available.
Inventors
- 👤 Albert Kurzl
- 👤 Johann Steinkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:48
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2132208A
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US2201326A
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US2239905A
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US2284529A
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US2513761A
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US2820206A
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US2892163A
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US2976498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |