Explosive and thermic compositions or charges – Structure or arrangement of component or product – Coated component
Reexamination Certificate
2011-07-26
2011-07-26
McDonough, James E (Department: 1731)
Explosive and thermic compositions or charges
Structure or arrangement of component or product
Coated component
C149S005000, C149S109400, C149S109600
Reexamination Certificate
active
07985309
ABSTRACT:
The present invention relates to a solid formulation, more particularly to a pellet-type formulation that produces CO2gas in a constant rate when contacting liquid acid. The pellet-type formulation of the invention is characterized in that the pellet is produced by the following: preparing a pellet by extrusion molding a composition that comprises a major amount of Sodium Carbonate (Na2CO3) and a minor amount of gelatin, and additionally a minor amount of synthetic resin that hardly reacts with acid; coating said pellet with a resin that hardly reacts with acid; and forming a recess or a hole at the center of the pellet. The present invention also relates to a process of preparing a pellet-type formulation that produces CO2gas in a constant rate when contacting liquid acid.
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E-WHA Fresenius Kabi Inc.
McDonough James E
Sughrue & Mion, PLLC
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