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US3762970A
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US
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Gelled nitroparaffin explosive composition containing air entrapper plus inert weighting material
Assignee: Camco Drilling Group Ltd
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Filing: 1972-12-04
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Granted: 1973-10-02
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Expires: 1992-12-04
Abstract
Abstract A cap-sensitive explosive suitable for use in underwater seismic work including a gelled nitroparaffin, a nitrate, a weighting material and an air-entrapping material; and method for making same including the steps of pre-mixing the gelled nitroparaffin and nitrate to form a relatively dry mixture and admixing therewith a weighting material and an air-entrapping material. This abstract is neither intended to define the invention of the application, which of course is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 C Ballard
- 👤 Millan T Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:18
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/002; C06B23/003; C06B23/001; C06B31/00; C06B31/28; C06B31/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
31 words
admixing with said mixture inert weighting material, air-entrapping material, and inert filler material, in amounts equal to 15 , percent 3 percent and 2 percent by weight, respectively, of said explosive.
Claim 2
Dependent Claim
11 words
admixing with said mixture a weighting material and an air-entrapping material.
Claim 3
Dependent Claim
29 words
The explosive according to claim 1 wherein said nitroparaffin is selected from the group consisting of nitromethane, nitroethane, 1-nitropropane, 2-nitropropane and mixtures of two or more of said nitroparaffins.
Claim 4
Dependent Claim
31 words
The explosive according to claim 1 wherein said nitrate is selected from the group consisting of ammonium nitrate, sodium nitrate, lithium nitrate and mixtures of two or more of said nitrates.
Claim 5
Dependent Claim
46 words
An explosive comprising, 15 to 30 percent by weight gelled nitromethane, 50 to 65 percent by weight ammonium nitrate, 10 to 20 percent by weight barite, 2 1/2 to 5 percent by weight air-entrapping material selected from the group consisting of resin balloons and glass microballoons.
Claim 6
Dependent Claim
38 words
An explosive comprising a. 20 percent by weight gelled nitromethane, b. 60 percent by weight ammonium nitrate, c. 15 percent by weight barite, d. 3 percent by weight air-entrapping material, e. 2 percent by weight inert filler material.
Claim 7
Dependent Claim
13 words
The explosive according to claim 5 wherein said air-entrapping material is resin ballons.
Claim 8
Dependent Claim
13 words
The explosive according to claim 5 wherein said air-entrapping material is glass Microballoons.
Claim 9
Independent Claim
10 words
A method of manufacturing an explosive comprising the steps of
Claim 10
Dependent Claim
61 words
The method according to claim 8 wherein said gelled nitroparaffin comprises 15 to 30 percent by weight of said explosive, said inorganic nitrate comprises 50 to 65 percent by weight of said explosive; said weighting material comprises 10 to 20 percent by weight of said explosive, and said air-entrapping material comprises 2 1/2 to 5 percent by weight of said explosive.
Claim 11
Independent Claim
10 words
A method of manufacturing an explosive comprising the steps of
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |