US2935309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine having independently operable skids
Assignee: Salem Tool Co
•
Filing: 1956-07-02
•
Granted: 1960-05-03
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1429551A
Cited
US2062657A
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US2394194A
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US2833531A
Cited
US2699328A
Cited
US2616677A
Cited
US2826402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |