US2671197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetizing means for rail flaw detector systems
Assignee: Individual
•
Filing: 1950-09-02
•
Granted: 1954-03-02
•
Expires: 1970-09-02
Abstract
No abstract record available.
Inventors
- 👤 Walter C Barnes
- 👤 Brazitis William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:44
CPC Classifications
B; B61; B61K; B61K9/00; B61K9/08; B61K9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2311715A
Cited
US2250459A
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US2425857A
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US2497855A
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US2497856A
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US2622131A
Cited
US2602840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |