Patent US2983792A successfully refreshed from Google Patents.
US2983792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordinate switching devices
Assignee: Siemens and Halske AG
•
Filing: 1956-05-17
•
Granted: 1961-05-09
•
Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Nitsch Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:22
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/22; H01H67/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2187115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |