US3385466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for closing core pin holes
Assignee: Westinghouse Air Brake Co
•
Filing: 1966-12-19
•
Granted: 1968-05-28
•
Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Hook
- 👤 Dale A Chovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:22
CPC Classifications
B; B22; B22D; B22D31/00; B22D31/002; B22D17/00; B22D17/20; B22D17/22; B22D17/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2657817A
Cited
GB741448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |