Patent US5667473A successfully refreshed from Google Patents.
Patent US1837473A successfully refreshed from Google Patents.
US1837473A
Expired / Lapsed
US
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Slack adjusting device
Assignee: Westinghouse Air Brake Co
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Filing: 1929-09-20
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Granted: 1931-12-22
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Expires: 1949-09-20
Abstract
No abstract record available.
Inventors
- 👤 Neveu Anselme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
B; B61; B61H; B61H15/00; B61H15/0007; B61H15/0014; B61H15/0028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-12-21 | 1935-06-22 | 1935-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-21 | 1939-06-22 | 1939-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-21 | 1943-06-22 | 1943-12-22 | $7700.00 | Window Closed / Lapsed |