US2776429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex communications system
Assignee: MULTIPLEX DEV CORP
•
Filing: 1951-01-27
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Granted: 1957-01-01
•
Expires: 1971-01-27
Abstract
No abstract record available.
Inventors
- 👤 Roy A Olerud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/86; H04H20/88; H04J; H04J1/00; H04J1/18
Claims Analysis
Total Claims: 0
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US2630497A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |