Patent US3419683A successfully refreshed from Google Patents.
US3419683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic substation transfer system
Assignee: AT&T Inc
•
Filing: 1965-10-22
•
Granted: 1968-12-31
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Henry J Michael
- 👤 Charles E Morse
- 👤 Frank G Oram
- 👤 Edgar J Roccati
- 👤 John P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:21
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |