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US2983789A
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Arrangement for suppressing disturbance in telegraphic communications
Assignee: Siemens and Halske AG
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Filing: 1957-04-15
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Granted: 1961-05-09
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Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 Hennig Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:33
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0045; H03; H03M; H03M13/00; H03M13/47; H03M13/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2235755A
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US2640872A
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US2552629A
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US2706215A
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US2653996A
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US2628346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |