Patent US4882686A successfully refreshed from Google Patents.
US3170366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for filling bore-holes formed in rock formation with particulate explosive
Assignee: Nitroglycerin AB
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Filing: 1961-12-15
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Granted: 1965-02-23
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Expires: 1981-12-15
Abstract
No abstract record available.
Inventors
- 👤 Alfredsson Sven Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:29
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A DEVICE FOR FILLING A BORE-HOLE WITH PARTICULATE EXPLOSIVE CONVEYED INTO THE HOLE BY PRESSURE FLUID COMPRISING TUBE MEANS HAVING A SMALLER DIAMETER THAN SAID BORE-HOLE, FILTER MEANS MOUNTED ON SAID TUBE MEANS ADJACENT TO THE DISCHARGE END THEREOF AND EXTENDING ENTIRELY AROUND THE SAME, SAID FILTER MEANS BEING ENGAGEABLE WITH THE WALLS OF SAID BORE-HOLE IN A MANNER TO MAINTAIN SAID TUBE MEANS IN CONCENTRIC RELATION WITH SAID BOREHOLE, WHEREBY PARTICULATE EXPLOSIVE WILL BE DISCHARGED INTO SAID BORE-HOLE AND PARTICLES OF EXPLOSIVE ENTRAINED IN SAID PRESSURE FLUID WILL BE REMOVED FROM THE FLUID ADJACENT TO THE DISCHARGE FROM THE TUBE MEANS.
Claim 2
Independent Claim
102 words
A DEVICE FOR FILLING A BORE-HOLE WITH PARTICULATE EXPLOSIVE CONVEYED INTO THE HOLE BY PRESSURE FLUID COMPRISING TUBE MEANS HAVING A SMALLER DIAMETER THAN SAID BORE-HOLE, FILTER MEANS MOUNTED ON SAID TUBE MEANS ADJACENT TO THE DISCHARGE END THEREOF AND EXTENDING ENTIRELY AROUND THE SAME, SAID FILTER MEANS BEING ENGAGEABLE WITH THE WALLS OF SAID BORE-HOLE IN A MANNER TO MAINTAIN SAID TUBE MEANS IN CONCENTRIC RELATION WITH SAID BOREHOLE, WHEREBY PARTICULATE EXPLOSIVE WILL BE DISCHARGED INTO SAID BORE-HOLE AND PARTICLES OF EXPLOSIVE ENTRAINED IN SAID PRESSURE FLUID WILL BE REMOVED FROM THE FLUID ADJACENT TO THE DISCHARGE FROM THE TUBE MEANS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |