US3417922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for fixing railroad rails to their sleepers
Assignee: Paulstra SNC
•
Filing: 1966-10-21
•
Granted: 1968-12-24
•
Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 Vaulry Jean Dargier De Saint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
E; E01; E01B; E01B19/00; E01B19/003; E01B9/00; E01B9/02; E01B9/28; E01B9/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2719676A
Cited
US878588A
Cited
US892789A
Cited
FR1137820A
Cited
US2944740A
Cited
FR1228130A
Cited
US3223328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |