Wound dressing having a porous structure
Patent 5298015 Issued on March 29, 1994. Estimated Expiration Date: 
March 20, 2012. 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 20, 2012. 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 Odor absorbing wrap Collagen membranes for medical use Wound dressing material Wound dressing Patent #: 4997425 InventorsAssigneeApplicationNo. 854765 filed on 03/20/1992US Classes:602/46, Polymeric foam424/444, Resorbable by the body424/445, Dressings602/43, Wound contact surface604/369Foam or cellular structure materialExaminersPrimary: Prebilic, Paul B.Attorney, Agent or FirmInternational ClassesA61F 013/00A61F 015/00 Foreign Application Priority Data1989-07-11 JPAbstractA dressing for a wound having a porous structure of continuous pores throughout the dressing made of minute filaments arranged in three dimensions and filmy links (viewed at a magnification of about 35 to 350) connecting the filaments. The porous structure has pores defined by the filmy interconnections. In other words, the wound dressing has a continuous open-celled structure in an expanded foam. The wound dressing can advantageously be made of a highly biocompatible material, such as poly--amino acid.Other References
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