US2568375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal distribution system
Assignee: —
•
Filing: —
•
Granted: 1951-09-18
•
Expires: 1968-09-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:50
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4902; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55; H03K3/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2057773A
Cited
US2471253A
Cited
US2365450A
Cited
US2426256A
Cited
US2428390A
Cited
US2444950A
Cited
US2479020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |