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US3738276A Expired / Lapsed US ⏱️ 0.0 years remaining

Container with controllably desensitized explosive mixtures

Assignee: United States Department of the Army
•
Filing: 1971-11-17
•
Granted: 1973-06-12
•
Expires: 1991-11-17
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Abstract

Abstract A composite semi-liquid system for thickening halogenated organic liquids, such as Freon 113 (a registered trademark of E. I. DuPont de Nemours & Co.) to improve safety in the formulation and handling of certain highly-sensitive-to-detonation mixtures, for example, a mixture of secondary and primary explosives, or a combination of a solid sensitive oxidizer with a pyrotechnic fuel. The thickened halocarbon is used in two stages, first a selected combination of gelling agents such as Cab-O-Sil M-5 (a registered trademark of the Cabot Corporation) and Bentone 38 (a registered trademark of N. L. Industries, Inc.) is incorporated into the halocarbon and the resultant slurry is then used to desensitize the explosive by admixture. The desensitized explosive is packaged in a container which is permeable to the halocarbon vapor and this package is immersed in a vessel containing a halocarbon gel obtained by selective gellation with gellants such as Alumagel (a registered trademark of Witco Chemical Co.); this second gel provides a means for preventing a rapid escape of the liquid from the vessel if a leak occurs.

Inventors

  • 👤 J Picard
  • 👤 H Voigt
  • 👤 L Pell

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 20:06
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/18; F; F42; F42B; F42B39/00; F42B39/14; F42C; F42C15/00; F42C15/38

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 33 words
The article of manufacture, of claim 1, wherein the particulate thickening agent is a silica of sub micron size, and said inner gelling agent is an organic ammonium salt of an acid clay.
Claim 2
Dependent Claim 35 words
The article of manufacture of claim 1, wherein said composite article is contained in a vessel impermeable to the vapor of the first liquid component of both the densensitizing slurry and the outer protective gel.
Claim 3
Dependent Claim 52 words
The article of manufacture of claim 3, wherein said outer gelling agent is an aluminum di-soap of the formula (R COO)2 OH Al and wherein R is selected from the group consisting of aliphatic hydrocarbon radicals of seven to 22 carbon atoms and alicyclic hydrocarbon radicals of seven to 22 carbon atoms.
Claim 4
Dependent Claim 31 words
The article of manufacture of claim 4, wherein (RCOO) is a monobasic acid radical selected from the group consisting of lauric, myristic, palmitic, oleic, linoleic, napthemic, 2-ethylhexoic, stearic, and mixtures thereof.
Claim 5
Dependent Claim 45 words
The article of manufacture of claim 3, wherein said second liquid is selected from the group consisting of 1, 1, 2 trichloro-1,2,2 trifluoroethane; 1, 1, 2, 2 tetrachloro - 1, 2 difluoroethane; 1, 1, 2, 2 tetrafluoro - 1, 2 dibiomoethane,; carbon tetrachloride; and tetrachloroethylene.

References Cited (Backward Citations)

US2368310A Cited
US2958277A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-06-11 1976-12-11 1977-06-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-06-11 1980-12-11 1981-06-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-06-11 1984-12-11 1985-06-12 $7700.00 Window Closed / Lapsed

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