US3032628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit controlling device
Assignee: AT&T Inc
•
Filing: 1959-06-25
•
Granted: 1962-05-01
•
Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 Walter B Ellwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:50
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/005; H01H51/00; H01H51/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073; Y10T29/49105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2406021A
Cited
US2457218A
Cited
US2527475A
Cited
US2491907A
Cited
US2506414A
Cited
US2653199A
Cited
US2921161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |