US3486465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dampened railway car truck bolster
Assignee: Midland Ross Corp
•
Filing: 1967-08-22
•
Granted: 1969-12-30
•
Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Munson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:02
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2324267A
Cited
US2312881A
Cited
US2352693A
Cited
US2422638A
Cited
US2729174A
Cited
US2729173A
Cited
US3320904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |