US2477535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pin retainer for draft keys
Assignee: T Z RAILWAY EQUIPMENT CO
•
Filing: 1946-02-16
•
Granted: 1949-07-26
•
Expires: 1966-02-16
Abstract
No abstract record available.
Inventors
- 👤 Otto E Wilson
- 👤 William H Sale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:14
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/20; B61G9/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1248586A
Cited
US1268991A
Cited
US1410479A
Cited
US1761266A
Cited
US1680330A
Cited
US1864842A
Cited
US1994707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |