Patent US2560418A successfully refreshed from Google Patents.
Patent US2988015A successfully refreshed from Google Patents.
US2988015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car suspension systems
Assignee: General Steel Castings Corp
•
Filing: 1957-10-07
•
Granted: 1961-06-13
•
Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Richard L Lich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:08
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/052; B61; B61C; B61C9/00; B61C9/38; B61C9/48; B61C9/50; B61C9/52; B61F; B61F3/00; B61F3/02; B61F3/04; B61F5/00; B61F5/02; B61F5/04; B61F5/10; B61F5/14; B61F5/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US295417A
Cited
US758604A
Cited
US811622A
Cited
US1723720A
Cited
US2190762A
Cited
US2257913A
Cited
US2247458A
Cited
US2288383A
Cited
US2500906A
Cited
US2514034A
Cited
US2636451A
Cited
US2633811A
Cited
US2758549A
Cited
US2908230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |