US2590033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Springs for rail trucks
Assignee: Transit Research Corp
•
Filing: 1945-09-04
•
Granted: 1952-03-18
•
Expires: 1965-09-04
Abstract
No abstract record available.
Inventors
- 👤 Emil H Piron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/125
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US450627A
Cited
US578305A
Cited
US199945A
Cited
US839571A
Cited
US1550307A
Cited
US1640180A
Cited
US1952295A
Cited
US1905252A
Cited
US1936389A
Cited
US2046391A
Cited
GB432304A
Cited
FR808983A
Cited
US2184102A
Cited
US2264702A
Cited
US2358279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |