US2624779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail flaw detecting apparatus
Assignee: Individual
•
Filing: 1948-07-14
•
Granted: 1953-01-06
•
Expires: 1968-07-14
Abstract
No abstract record available.
Inventors
- 👤 Frank H Keaton
- 👤 David C Bettison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
B; B61; B61K; B61K9/00; B61K9/08; B61K9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2109455A
Cited
US2219885A
Cited
US2244606A
Cited
US2245568A
Cited
US2410803A
Cited
US2276011A
Cited
US2461252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |