Patent US3893612A successfully refreshed from Google Patents.
Patent US3394368A successfully refreshed from Google Patents.
US3394368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal switching system and control keyboard suitable for use therein
Assignee: Ambac International Corp
•
Filing: 1964-04-01
•
Granted: 1968-07-23
•
Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Carr
- 👤 Finkel Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:16
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0238
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2432324A
Cited
US3226712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |