Patent US2567700A successfully refreshed from Google Patents.
US2567700A
Expired / Lapsed
US
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Apparatus for making electrical measurements
Assignee: AT&T Inc
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Filing: 1946-09-11
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Granted: 1951-09-11
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Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Ehlschlager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:25
CPC Classifications
G; G01; G01R; G01R17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1660405A
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US1825514A
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US1919538A
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US2281995A
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US2232792A
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US2320175A
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US2394892A
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US2490377A
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US2474692A
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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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |