US2522976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical ratio-measuring system
Assignee: Leeds and Northrup Co
•
Filing: 1946-12-13
•
Granted: 1950-09-19
•
Expires: 1966-12-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/163; G01; G01R; G01R27/00; G01R27/02; G01R27/08; G01R27/10; G01R27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2213524A
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US2281995A
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US2331138A
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US2287808A
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US2349261A
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US2367746A
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US2375775A
Cited
US2425059A
Cited
US2391271A
Cited
US2412111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |