Patent US6302893B1 successfully refreshed from Google Patents.
Patent US3392451A successfully refreshed from Google Patents.
US3392451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic railway track inspecting apparatus
Assignee: Cleveland Technical Center Inc
•
Filing: 1966-06-28
•
Granted: 1968-07-16
•
Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 Leo R Lombardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:40
CPC Classifications
B; B61; B61K; B61K9/00; B61K9/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2118105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |