US3070666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distributed line concentrator system
Assignee: AT&T Inc
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Filing: 1960-07-22
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Granted: 1962-12-25
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Chester E Brooks
- 👤 Jr George B Crofutt
- 👤 James L Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/40; H10D84/401; H10D84/403; H03; H03K; H03K19/00; H03K19/0175; H03K19/0185; H03K19/018507; H04; H04Q; H04Q3/00; H04Q3/0004; 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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |