Patent US2755434A successfully refreshed from Google Patents.
US2755434A
Expired / Lapsed
US
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Magnetic measuring system
Assignee: Leeds and Northrup Co
•
Filing: 1950-08-16
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Granted: 1956-07-17
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Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Edward W Yetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04; G01R33/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2053154A
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US2406870A
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US2444726A
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US2570870A
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US2421583A
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US2466687A
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US2475593A
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US2480575A
Cited
GB619525A
Cited
US2520677A
Cited
US2584571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |