Apparatus and method for controlled delivery of a gas
AssigneeSelective Micro Technologies, LLC
InventorsRichard A. Hamilton, John J. Warner
Life of this patent
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Abstract
Disclosed are apparatus for delivery of a gas, e.g., carbon dioxide and/or chlorine dioxide, and methods of its use and manufacture. The apparatus includes an envelope, and a sachet within the envelope that contains reactant, which generates a gas in the presence of an initiating agent, e.g., water. In another embodiment, the apparatus includes a barrier layer, a sachet layer disposed adjacent to the barrier layer, a reactant disposed between the barrier layer and the sachet layer that generates a gas in the presence of an initiating agent, and an envelope layer disposed adjacent to the sachet layer.
Claims20
An apparatus for delivery of a gas comprising:
- a barrier layer;
- a sachet layer disposed adjacent to the barrier layer;
- a reactant disposed in a volume defined by the barrier layer and the sachet layer that generates a gas in the presence of a liquid or vapor initiating agent;
- and
- an envelope layer disposed adjacent to the sachet layer, wherein the envelope layer allows release of the gas from the apparatus,
- wherein the barrier layer is an impermeable layer that substantially prevents or hinders passage of the liquid or vapor initiating agent.
An apparatus for delivery of a gas comprising:
- a barrier layer formed to define a first cavity and a second cavity;
- a sachet layer disposed adjacent to the barrier layer, the sachet layer comprising a hydrophilic membrane having a pore size of between about 0.05 microns and about 5 microns and a thickness between about 100 microns and 400 microns;
- a reactant disposed in a volume defined by the barrier layer and the sachet layer in the first cavity that generates a gas in the presence of a liquid or vapor initiating agent;
- a desiccant disposed between the barrier layer and the sachet layer in the second cavity;
- and
- an envelope layer disposed adjacent to the sachet layers the envelope layer comprising a hydrophobic membrane having a pore size of between about 0.01 microns and 50 microns and a thickness between about 100 microns and 400 microns, wherein the envelope layer allows release of the gas from the apparatus,
- wherein the barrier layer is an impermeable layer that substantially prevents or hinders passage of the liquid or vapor initiating agent.
An apparatus for delivery of a gas comprising:
- a barrier layer;
- a sachet layer disposed adjacent to the barrier layer;
- and
- a reactant disposed in a volume defined by the barrier layer and the sachet layer that generates a gas in the presence of a liquid or vapor initiating agent,
- wherein the sachet layer allows entry of the initiating agent into the apparatus, and the barrier layer is an impermeable layer that substantially prevents or hinders passage of the liquid or vapor initiating agent.
A method of forming an apparatus for delivery of a gas comprising;
- (a) providing a multi-layer structure comprising a reactant layer centrally disposed between a sachet layer and a barrier layer, and an envelope layer disposed adjacent to the sachet layer;
- and
- (b) sealing the perimeter of the barrier layer) sachet layer and barrier layer such that the reactant is disposed in a volume defined by the sachet layer and the barrier layer,
- wherein the barrier layer is an impermeable layer that substantially prevents or hinders passage of a liquid or vapor initiating agent.
A method of forming an apparatus for delivery of a gas comprising;
- (a) providing a multi-layer structure comprising a reactant layer centrally disposed between a sachet layer and a barrier layer;
- and
- (b) sealing the multi-layer structure such that the such that the reactant is disposed in a volume defined by the sachet layer and the barrier layer,
- wherein the barrier layer is an impermeable layer that substantially prevents or hinders passage of a liquid or vapor initiating agent.
A method of forming an apparatus for delivery of a gas comprising;
- (a) providing an apparatus for delivery of a gas comprising an envelope layer, a sachet layer disposed adjacent to the envelope layer, a barrier layer disposed adjacent to the sachet layer, and a reactant disposed in a volume defined by the sachet layer and the barrier layer;
- and
- (b) disposing the apparatus in an environment that comprises a liquid or vapor initiating agent,
- wherein the barrier layer is an impermeable layer tat substantially prevents or binders passage of the liquid or vapor initiating agent.
A method of delivering gas comprising:
- (a) providing an apparatus for delivery of a gas comprising:
- a barrier layer;
- a sachet layer disposed adjacent to the barrier layer;
- a reactant disposed between the barrier layer and the sachet layer that generates a gas in the presence of a liquid or vapor initiating agent;
- and
- an envelope layer disposed adjacent to the sachet layer, wherein the envelope layer allows release of the gas from the apparatus;
- and
- (b) disposing the apparatus in an environment that comprises an initiating agent,
- wherein the barrier layer is an impermeable layer that substantially prevents or hinders passage of the liquid or vapor initiating agent.
Dependencies are inferred from the claim text.