US3439124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pcm switching matrix
Assignee: International Standard Electric Corp
•
Filing: 1966-03-03
•
Granted: 1969-04-15
•
Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jacques Georges Dupieux
- 👤 Alfred Pirotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:20
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0407; H04J; H04J3/00
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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |