US2527138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making resistance measurements
Assignee: AT&T Inc
•
Filing: 1945-03-08
•
Granted: 1950-10-24
•
Expires: 1965-03-08
Abstract
No abstract record available.
Inventors
- 👤 Peter J Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:52
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/10; G01R17/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US955191A
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US1460530A
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US1494586A
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US1537281A
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US1665397A
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US1877739A
Cited
US1951461A
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US1961965A
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US2339116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |