US3027548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic coupling arrangements
Assignee: AT&T Inc
•
Filing: 1956-12-17
•
Granted: 1962-03-27
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Henry E Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/81; G; G11; G11C; G11C17/00; G11C17/02; H04; H04Q; H04Q3/00; H04Q3/42; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US233968A
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US252395A
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US2064771A
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US2667542A
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US2794073A
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US2776411A
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US2740110A
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US2825891A
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US2700150A
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US2831180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |