US2628999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuity, polarity, and breakdown test device
Assignee: AT&T Inc
•
Filing: 1949-04-07
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Granted: 1953-02-17
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Expires: 1969-04-07
Abstract
No abstract record available.
Inventors
- 👤 Bruyne Anton L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:11
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; G; G01; G01R; G01R31/00; G01R31/50; G01R31/54; G01R31/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1588539A
Cited
US1738710A
Cited
US1977703A
Cited
US1950484A
Cited
US2456453A
Cited
US2481282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |