US3391356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip-line filter
Assignee: United States Department of the Army
•
Filing: 1964-06-30
•
Granted: 1968-07-02
•
Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Bolljahn Harriette
- 👤 George L Matthaei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:39
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2819452A
Cited
US3069587A
Cited
US2915716A
Cited
US2945195A
Cited
US2968012A
Cited
US3327255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |