US2620178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction shock absorber for railway car truck springs
Assignee: W H MINER Inc
•
Filing: 1949-03-30
•
Granted: 1952-12-02
•
Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 Edward H Lehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:03
CPC Classifications
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
US1985369A
Cited
US2216231A
Cited
US2286845A
Cited
US2479863A
Cited
US2484750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |