US2662175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex transmission device
Assignee: Hartford National Bank and Trust Co
•
Filing: 1948-02-18
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Granted: 1953-12-08
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Expires: 1968-02-18
Abstract
No abstract record available.
Inventors
- 👤 St Cornelis Johannes Antonius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2272070A
Cited
US2478920A
Cited
US2444950A
Cited
US2486491A
Cited
US2471138A
Cited
US2443198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |