US4511412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a water-in-oil emulsion exposive
Assignee: NOF Corp
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Filing: 1984-07-20
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Granted: 1985-04-16
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Expires: 2004-07-20
Abstract
Abstract A water-in-oil emulsion explosive, comprising aqueous inorganic oxidizer solution, oil, emulsifier and hollow microspheres, and having high low-temperature detonability and storage stability can be produced without causing breakage of the hollow microspheres through a specifically limited kneading method, wherein agitating blades fitted to an agitating shaft in a kneader are subjected to up and down movements in the axial directions of the agitating shaft and concurrently to a rotary motion to knead homogeneously a water-in-oil emulsion formed of the aqueous solution of inorganic oxidizer, oil and emulsifier, together with the hollow microspheres.
Inventors
- 👤 Shigeru Kakino
- 👤 Katsuhide Hattori
- 👤 Yoshiaki Fukatsu
- 👤 Hideo Moriyama
- 👤 Hidekazu Sakakibara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:37
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008; B; B01; B01F; B01F31/00; B01F31/40; B01F23/00; B01F23/40; B01F23/41; B01F23/43; C06B47/00; C06B47/14; C06B47/145; B01F27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
In a method of producing water-in-oil emulsion explosive, comprising a step for conditioning an aqueous solution of inorganic oxidizer, a step for conditioning an oil, an emulsifier, or a mixture of oil and emulsifier, a step for mixing the aqueous solution of inorganic oxidizer with the oil and the emulsifier, a step for emulsifying the resulting mixture to form a water-in-oil emulsion, a step for kneading the resulting water-in-oil emulsion together with hollow microspheres, and a step for packing the resulting water-in-oil emulsion explosive, the improvement comprising said kneading step being a kneading step, wherein agitating blades fitted to an agitating shaft in a kneader are subjected to up and down movements in the axial directions of the agitating shaft and concurrently to a rotary motion together with the agitating shaft to knead the water-in-oil emulsion together with hollow microspheres, and the resulting kneaded mixture is exhausted from the bottom portion of the kneader or taken out from the upper portion thereof.
Claim 2
Dependent Claim
162 words
In a method of producing water-in-oil emulsion explosive, comprising a step for conditioning an aqueous solution of inorganic oxidizer, a step for conditioning an oil, an emulsifier, or a mixture of oil and emulsifier, a step for mixing the aqueous solution of inorganic oxidizer with the oil and the emulsifier, a step for emulsifying the resulting mixture to form a water-in-oil emulsion, a step for kneading the resulting water-in-oil emulsion together with hollow microspheres, and a step for packing the resulting water-in-oil emulsion explosive, the improvement comprising said kneading step being a kneading step, wherein agitating blades fitted to an agitating shaft in a kneader are subjected to up and down movements in the axial directions of the agitating shaft and concurrently to a rotary motion together with the agitating shaft to knead the water-in-oil emulsion together with hollow microspheres, and the resulting kneaded mixture is exhausted from the bottom portion of the kneader or taken out from the upper portion thereof.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |