US2951365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-sonic apparatus for the detection of defects in railway rails
Assignee: Holding Electrosonic S A
•
Filing: 1957-04-09
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Granted: 1960-09-06
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Expires: 1977-04-09
Abstract
No abstract record available.
Inventors
- 👤 Legrand Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:32
CPC Classifications
B; B61; B61K; B61K9/00; B61K9/08; B61K9/10; E; E01; E01B; E01B35/00; G; G01; G01N; G01N29/00; G01N29/22; G01N29/26; G01N29/265; E01B2203/00; E01B2203/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2252424A
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US2522924A
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US2645938A
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US2672753A
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US2666862A
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US2678559A
Cited
US2824979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |