Patent US2683311A successfully refreshed from Google Patents.
Patent US2906064A successfully refreshed from Google Patents.
US2906064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail head grinding mechanism
Assignee: Railtrack Equipment Corp S A
•
Filing: 1955-05-05
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Granted: 1959-09-29
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Expires: 1975-05-05
Abstract
No abstract record available.
Inventors
- 👤 Herman H Ackermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:33
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/004
Claims Analysis
Total Claims: 0
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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) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |