US2476278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing conductors
Assignee: AT&T Inc
•
Filing: 1944-10-03
•
Granted: 1949-07-19
•
Expires: 1964-10-03
Abstract
No abstract record available.
Inventors
- 👤 Wentworth D Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:30
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/58; G01R31/59
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US245567A
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US284138A
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GB121204A
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US1445260A
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US1782397A
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US1882815A
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US1927045A
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US1961755A
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US1967296A
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US1956806A
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US2092439A
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US2292549A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |