Patent US3366746A successfully refreshed from Google Patents.
US3366746A
Expired / Lapsed
US
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Subscriber's equipment in an electronic switching system
Assignee: International Standard Electric Corp
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Filing: 1964-04-01
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Granted: 1968-01-30
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Gracia Floreal Amo
- 👤 Dupieux Jacques Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:05
CPC Classifications
H; H04; H04M; H04M1/00; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |