US2890369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuator
Assignee: GTE Sylvania Inc
•
Filing: 1956-10-02
•
Granted: 1959-06-09
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Dry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:34
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2575383A
Cited
US2632130A
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US2669674A
Cited
US2567415A
Cited
US2660690A
Cited
US2707759A
Cited
US2730647A
Cited
US2730649A
Cited
US2771565A
Cited
US2811673A
Cited
US2809321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |