Method of manufacturing a wound dressing
Patent 5149469 Issued on September 22, 1992. Estimated Expiration Date: 
March 26, 2011. 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.
March 26, 2011. 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 3113568 3800792 3867520 Porous shaped article of regenerated cellulose adapted for medical use Method of making prolonged release body Collagen sponge Odor absorbing wrap Collagen membranes for medical use Wound dressing material Process of making collagen membranes for medical use InventorsAssigneeApplicationNo. 665203 filed on 03/26/1991US Classes:264/28, WITH STEP OF COOLING TO A TEMPERATURE OF ZERO DEGREES C. OR BELOW514/944, GEL516/103, The compound contains plural peptide linkages, i.e., compound formed from amino acids, natural or synthetic, by reaction of a carboxyl group of one such amino acid with an amino group of another same or different such amino acid516/926, Phase change (e.g., melting)602/50, Amino acid, polypeptide, or protein602/900METHOD OF MAKING BANDAGE STRUCTUREExaminersPrimary: Beck, ShriveAssistant: Owens, Terry J. Attorney, Agent or FirmInternational ClassA61L 015/00Foreign Application Priority Data1989-07-11 JPAbstractA method of manufacturing a wound dressing having microscopic web-like interconnections and a porous structure of continuous pores throughout the wound dressing. In the first embodiment of the method, the dressing is produced by the steps of heating while simultaneously stirring a biocompatible material and solvent to form a homogenous solution; cooling while simultaneously stirring the homogenous solution to form a gel made of a dispersion of gel particles of the biocompatible material and freeze-drying the gel. In a second embodiment of the method, the wound dressing is produced by heating while simultaneously stirring a biocompatible material and the solvent to form a homogenous solution, cooling while simultaneously stirring the homogenous solution to form a gel made of a dispersion of gel particles of the biocompatible material; warming while simultaneously stirring the gel, allowing the warm gel to cool to form a soft gel and freeze-drying the soft gel. Finally, in a third embodiment of the method, the steps of heating while simultaneously stirring a biocompatible material and the solvent to form a homogenous solution, adding a liquid which inhibits the freezing of the homogenous solution, cooling while simultaneously stirring the homogenous solution to form a gel comprising a dispersion of gel particles of the biocompatible material and freeze-drying the gel.Field of SearchBandage, pad, or shield placed on body for sustained treatment thereofBandage, pad, shield, or attaching means extendable around body portion Foam or cellular structure material Collagen or gelling material Resorbable by the body Dressings Medicated gauze pads Bandages with incorporated medicaments Transdermal or percutaneous METHOD OF MAKING BANDAGE STRUCTURE Amino acid, polypeptide, or protein WITH STEP OF COOLING TO A TEMPERATURE OF ZERO DEGREES C. OR BELOW GEL | |
