US3450840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex data transmission system using orthogonal transmission waveforms
Assignee: International Business Machines Corp
•
Filing: 1965-11-19
•
Granted: 1969-06-17
•
Expires: 1985-11-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:43
CPC Classifications
H; H04; H04J; H04J13/00; H04J13/10; H04J13/12; H04L; H04L23/00; H04L23/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |