US3534353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current limit detector
Assignee: AT&T Inc
•
Filing: 1967-07-11
•
Granted: 1970-10-13
•
Expires: 1987-07-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin T Calkin
- 👤 Joseph W Ianniello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R15/00; G01R15/08; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/569
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2787732A
Cited
US3178698A
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US3127589A
Cited
US3204193A
Cited
US3246233A
Cited
US3304490A
Cited
US3351847A
Cited
US3431557A
Cited
US3310688A
Cited
US3336511A
Cited
US3334241A
Cited
US3351927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |