US3516508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible shuttle car
Assignee: Consolidation Coal Co
•
Filing: 1968-04-30
•
Granted: 1970-06-23
•
Expires: 1988-04-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Lee
- 👤 Arthur B Coval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:03
CPC Classifications
B; B62; B62D; B62D21/00; B62D21/18; B62D21/186; E; E21; E21F; E21F13/00; E21F13/02; E21F13/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US95726A
Cited
US162729A
Cited
US400817A
Cited
US609925A
Cited
US630054A
Cited
US2113403A
Cited
US3185325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |