Back to results
US 4,992,410 AGranted
Oxygen-absorbing package, composition and method of formulation thereof
AssigneeMultiform Desiccants, Inc.
InventorsJohn S. Cullen, Nicholas E. Vaylen
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMultiform Desiccants, Inc.
InventorsJohn S. Cullen, Nicholas E. Vaylen
Estimating the term…
An oxygen-absorbing composition which will not absorb appreciable amounts of oxygen from the atmosphere during formulation and handling including a mixture of an oxygen-attracting component A, an aqueous electrolyte-impregnated component B, and a water-attracting component C which has a greater affinity for water from the electrolyte-impregnated component B than the oxygen-attracting component A and a greater affinity for water vapor from the atmosphere than the oxygen-attracting component so that the aqueous electrolyte from component B cannot appreciably react with the oxygen-attracting component A to absorb oxygen from the atmosphere during the time that water-attracting component C attracts water from component B and attracts water vapor from the atmosphere. A packet with a window therein for viewing the composition to determine whether, by change of color, it has absorbed oxygen. A method of formulating an oxygen-absorbing composition described above wherein the components A, B and C are mixed in the atmosphere shortly before packaging.
An oxygen-absorbing composition which will not absorb appreciable amounts of oxygen from the atmosphere during formulation and handling comprising at the time of formulation in relatively sufficient proportions an oxygen-attracting component, an aqueous electrolyte-impregnated component, and a dry water-attracting component which has a greater affinity for water from said aqueous electrolyte-impregnated component than said oxygen-attracting component and a greater affinity for water vapor from the atmosphere than said oxygen-attracting component so that said aqueous electrolyte from said aqueous electrolyte-impregnated component cannot appreciably react with said oxygen-attracting component to thereby prevent said oxygen-attracting component from prematurely combining with atmospheric oxygen until such time as more of an equilibrium is reached between said electrolyte-impregnated component and said dry water-attracting component at which time said oxygen-attracting component can react with oxygen in the presence of said electrolyte from said electrolyte-impregnated component.
A method of formulating an oxygen-absorbing composition under atmospheric conditions comprising the steps of providing a particulate oxygen-absorbing component, providing a dry liquid-absorbing component, providing an aqueous electrolyte-impregnated liquid-absorbing component, and mixing all of the foregoing components in the atmosphere so that said dry liquid-absorbing component having a greater affinity for water from said liquid-absorbing component and a greater affinity for water vapor from the atmosphere than said oxygen-absorbing component will prevent said electrolyte of said electrolyte-impregnated liquid-absorbing component from appreciably combining with said oxygen-absorbing component for a number of hours until after there has been an amount of absorption by said liquid-absorbing component of water from said electrolyte-impregnated liquid-absorbing component.
Dependencies are inferred from the claim text.