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Patent US2685836A successfully refreshed from Google Patents.
US2685836A
Expired / Lapsed
US
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Priming and tamping device for explosives in blast holdes
Assignee: Air Liquide SA
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Filing: 1950-03-13
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Granted: 1954-08-10
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Expires: 1970-03-13
Abstract
No abstract record available.
Inventors
- 👤 Sauvage Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:47
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08
Claims Analysis
Total Claims: 0
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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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |