US2838735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic delay line
Assignee: DYNAMIC ELECTRONICS NEW YORK I
•
Filing: 1953-12-17
•
Granted: 1958-06-10
•
Expires: 1973-12-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur S Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/30; H03H7/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2391038A
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US2457212A
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US2512945A
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GB632834A
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US2583854A
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US2514337A
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US2608610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |