Patent US935190A successfully refreshed from Google Patents.
Patent US2128257A successfully refreshed from Google Patents.
US2128257A
Expired / Lapsed
US
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Electrical network system
Assignee: AT&T Inc
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Filing: 1936-07-07
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Granted: 1938-08-30
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Expires: 1956-07-07
Abstract
No abstract record available.
Inventors
- 👤 Lee Yuk-Wing
- 👤 Wiener Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/142; H03; H03H; H03H7/00; H03H7/46; H04B3/143; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03006; H04L25/03012; H04L25/03114; H04L25/03127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-08-29 | 1942-02-28 | 1942-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-08-29 | 1946-02-28 | 1946-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-08-29 | 1950-02-28 | 1950-08-30 | $7700.00 | Window Closed / Lapsed |