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US2987631A
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Electrical signal coupling circuit
Assignee: Arthur D Little Inc
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Filing: 1958-07-14
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Granted: 1961-06-06
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Expires: 1978-07-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward C Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:27
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; H; H03; H03F; H03F3/00; H03F3/38; H03F3/40; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/857; Y10S505/869; Y10S505/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2832897A
Cited
US2949602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |