Thermal retaining fabric laminate
Patent 4913957 Issued on April 3, 1990. Estimated Expiration Date: 
May 23, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 23, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2562121 2932052 3657760 3780537 3885403 Article for the dispensing of volatiles Wound dressing Liquid loaded pad for medical applications Novel bandage for administering beneficial drug Transdermal drug delivery device Patent #: 4725439 InventorsAssigneeApplicationNo. 197377 filed on 05/23/1988US Classes:442/226, Woven fabric is coated, impregnated, or autogenously bonded424/447, Bandages with incorporated medicaments424/449, Transdermal or percutaneous428/64.1, CIRCULAR SHEET OR CIRCULAR BLANK442/290, Olefin polymer or copolymer sheet or film (e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.)442/374, Nonwoven fabric is coated, impregnated, or autogenously bonded442/385, Including a wood fiber containing layer442/397, Fluorinated olefin polymer or copolymer sheet or film (e.g., TeflonR, etc.)607/96Thermal applicatorsExaminersPrimary: McCamish, Marion E.Attorney, Agent or FirmInternational ClassB32B 027/00AbstractThere is disclosed a thermal retaining fabric laminate which can be used as a hot or cold pack to impart heated or cooled treatment liquids to the skin of a user. The laminate consists in sequence of a skin contact layer for absorbing, holding, and delivering the treatment liquid, a nonporous or low porous first barrier layer, a reservoir layer for absorbing and holding heat retention liquid, and a nonporous second barrier layer. The laminate has an open edge. The barrier layers serve to inhibit the release of vapor while the fabric laminate is in contact with the skin of a user thereby decreasing heat loss resulting from evaporation and increasing the time that the fabric laminate retains its heat. In one embodiment, the first barrier layer between the skin contact layer and the reservoir layer is of low porosity which when the fabric laminate is heated rapidly allows for the escape of vapor so that the vapor pressure created in the reservoir layer will not delaminate the fabric laminate. | |
