US3482531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced railway truck bolster
Assignee: Amsted Industries Inc
•
Filing: 1967-08-03
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Granted: 1969-12-09
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Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 Carl E Tack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:07
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/50; B61F5/52
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) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |