Patent US2828358A successfully refreshed from Google Patents.
US2828358A
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Multiple telegraph signal regenerators
Assignee: International Standard Electric Corp
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Filing: 1954-02-11
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Granted: 1958-03-25
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Expires: 1974-02-11
Abstract
No abstract record available.
Inventors
- 👤 Ridler Desmond Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/22; H04L25/00; H04L25/02; H04L25/20; H04L25/24; H04L25/242; H04L25/245; H04L5/24; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/32; H04Q1/36
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |