US2698421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide seal and filter structure
Assignee: Raytheon Co
•
Filing: 1952-05-23
•
Granted: 1954-12-28
•
Expires: 1972-05-23
Abstract
No abstract record available.
Inventors
- 👤 Kline Jack
- 👤 Rue Albert D La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:33
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01J; H01J23/00; H01J23/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2407911A
Cited
US2411534A
Cited
US2409913A
Cited
US2523155A
Cited
US2530171A
Cited
US2576186A
Cited
US2555349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |