US2422355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic railroad car coupler
Assignee: Individual
•
Filing: 1945-07-02
•
Granted: 1947-06-17
•
Expires: 1965-07-02
Abstract
No abstract record available.
Inventors
- 👤 George N Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:32
CPC Classifications
B; B61; B61G; B61G5/00; B61G5/06; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6866; Y10T137/6869; Y10T137/6873; Y10T137/8593; Y10T137/87153; Y10T137/87161; Y10T137/8807; Y10T137/88078
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |