US2814019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic method of detecting stress and strain in ferrous material
Assignee: Houston Oil Field Material Co Inc
•
Filing: 1951-10-03
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Granted: 1957-11-19
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Expires: 1971-10-03
Abstract
No abstract record available.
Inventors
- 👤 John C Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093; E; E21; E21B; E21B47/00; E21B47/09; E21B47/092; Y; Y10; Y10S; Y10S73/00; Y10S73/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB433620A
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US2370845A
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US2365073A
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US2435985A
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US2530309A
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US2564777A
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US2542893A
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US2582437A
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US2550964A
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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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |