Patent US2670136A successfully refreshed from Google Patents.
US2670136A
Expired / Lapsed
US
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Resilient traction rail joint insulator
Assignee: Railroad Rubber Products Inc
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Filing: 1948-10-22
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Granted: 1954-02-23
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Expires: 1968-10-22
Abstract
No abstract record available.
Inventors
- 👤 Nelson K Moses
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:58
CPC Classifications
E; E01; E01B; E01B11/00; E01B11/54
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |