US2862368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine roof bolt installation
Assignee: Individual
•
Filing: 1957-09-30
•
Granted: 1958-12-02
•
Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dempsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:20
CPC Classifications
E; E21; E21D; E21D21/00; E21D21/0086
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US587945A
Cited
US2470878A
Cited
GB191129003A
Cited
US1233181A
Cited
US1510978A
Cited
US1637047A
Cited
US1824941A
Cited
US2507308A
Cited
US2748594A
Cited
US2854824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |