Patent US3643665A successfully refreshed from Google Patents.
US3643665A
Expired / Lapsed
US
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Therapeutic pack for thermal applications
Assignee: Baxter International Inc
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Filing: 1969-04-04
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Granted: 1972-02-22
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Expires: 1989-04-04
Abstract
Abstract A therapeutic pack containing chemicals to produce a temperature-changing chemical reaction, e.g. endothermic or exothermic. The chemical components for the reaction are held spaced apart within a bag by a fracturable means, e.g. a diaphragm. The bag incorporates an insulation cover, e.g. minutely expanded polystyrene paper and aluminum foil, various portions of which may be selectively removed to provide an effective heat-transfer path of a predetermined size, to accomplish the desired therapeutic treatment.
Inventors
- 👤 James C Caillouette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; F; F24; F24V; F24V30/00; A61F2007/0001; A61F2007/0018; A61F2007/0028; A61F2007/0244; A61F2007/0249; A61F2007/0253; A61F2007/0255; A61F2007/0257; A61F2007/0268; A61F2007/0276; A61F7/10; A61F7/106
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A therapeutic pack for thermal heat treatment, including, a containing bag of flexible material, the bag including along particular portions of the bag at least three layers respectively constituting an external layer, an intermediate layer and an inner layer, the intermediate layer being heat reflective and the inner layer being imperforate, chemical means within the bag including at least a pair of components for producing a thermal reaction, one of the components being mobile to provide a mixing with the other component and to provide the thermal reaction in accordance with such mixing, and boundary means disposed relative to the bag to define within the bag two isolated compartments one for holding the mobile component and the other for holding the other component, the boundary means being responsive to the exertion of a force to become fractured for the movement of the mobile component into mixed relationship with the other component, the external layer and the reflective layer being removable from the inner layer at a selected portion of the bag to provide for a concentration of the thermal heat treatment at such selected portion.
Claim 2
Dependent Claim
128 words
A pack for thermal heat treatment, including, a first sealed container formed from at least a pair of layers along at least a portion of the container, at least one of the layers being heat reflective, a first chemical disposed within the container, a compartment sealed relative to the container and having a fracturable surface facing the first chemical in the container, and a second chemical disposed within the second container and having properties of mixing with the first chemical upon a fracture of the compartment and of reacting chemically with the first chemical to provide a thermal reaction, at least a selected portion of the heat reflective layer being removable from the container to provide for a concentration of the thermal heat treatment at such selected portion.
Claim 3
Dependent Claim
180 words
A pack for thermal heat treatment, including, a first sealed container formed from at least a pair of layers along at least a portion of the container, at least one of the layers being heat reflective, a first chemical disposed within the container, a compartment sealed relative to the container and having a fracturable surface facing the first chemical in the container, and a second chemical disposed within the second container and having properties of mixing with the first chemical upon a fracture of the compartment and of reacting chemically with the first chemical to provide a thermal reaction, the first sealed container has an external layer, an intermediate layer and an inner layer and wherein the external layer is made from a material having a relatively low heat conductivity, the intermediate layer is heat reflective and the inner layer is imperforate, the external layer and the intermediate layer being adhered to the inner layer but are removable from the inner layer at a selected position to provide for a concentration of the thermal heat treatment at the selected position.
Claim 4
Dependent Claim
18 words
The therapeutic pack set forth in claim 2 wherein the intermediate layer is made from a metallic foil.
Claim 5
Dependent Claim
23 words
The therapeutic pack set forth in claim 2 wherein the external layer is made from a material having a relatively low heat conductivity.
Claim 6
Dependent Claim
17 words
The pack set forth in claim 4 wherein the intermediate layer is made from a metallic foil.
Claim 7
Dependent Claim
18 words
The therapeutic pack set forth in claim 1 wherein the reflective layer is made from a metal foil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |