US3389930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail corner mounting
Assignee: United States Steel Corp
•
Filing: 1966-07-29
•
Granted: 1968-06-25
•
Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 James E Ashworth
- 👤 August L Bartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:56
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/14; E04H17/1413; E04H17/1447; E04H17/1465; Y; Y10; Y10T; Y10T403/00; Y10T403/71; Y10T403/7117
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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |