US2614831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction shock absorber for trucks of railway cars
Assignee: W H MINER Inc
•
Filing: 1949-07-16
•
Granted: 1952-10-21
•
Expires: 1969-07-16
Abstract
No abstract record available.
Inventors
- 👤 William E Withall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:02
CPC Classifications
F; F16; F16F; F16F3/00; F16F3/08; F16F3/087; F16F3/0873; B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR620246A
Cited
US2055242A
Cited
GB329870A
Cited
US1933034A
Cited
US2010623A
Cited
US2205098A
Cited
US2402146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |