Patent US3466094A successfully refreshed from Google Patents.
US3466094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting arrangement for oil shale mining
Assignee: United States Department of the Interior
•
Filing: 1968-02-05
•
Granted: 1969-09-09
•
Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 Gordon R Haworth
- 👤 Peter G Zambas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:34
CPC Classifications
E; E21; E21C; E21C41/00; E21C41/16; E21C41/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |