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US2806085A
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US
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Circuit arrangement to improve the impulsing and feeding in respect to stations with a long subscriber's line
Assignee: International Standard Electric Corp
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Filing: 1952-10-22
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Granted: 1957-09-10
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Expires: 1972-10-22
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:18
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2377544A
Cited
US1448572A
Cited
US1613685A
Cited
US1634299A
Cited
US1852619A
Cited
US1882851A
Cited
US2020816A
Cited
US2374072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |