US3054052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for connecting electrical networks
Assignee: AT&T Inc
•
Filing: 1959-04-29
•
Granted: 1962-09-11
•
Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 Harry R Shillington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:39
CPC Classifications
G; G01; G01R; G01R31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2529227A
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US2481033A
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US2577681A
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US2576903A
Cited
US2956226A
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US2849677A
Cited
US2869076A
Cited
US2927225A
Cited
US2932791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |