Biodegradable matrix and methods for producing same
Patent 4970298 Issued on November 13, 1990. Estimated Expiration Date: 
November 13, 2007. 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.
November 13, 2007. 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 ReferencesMethod for making collagen sponge Macromolecular biologically active collagen articles Method for preserving porosity in porous materials Patent #: 4522753 InventorsAssigneeApplicationNo. 875827 filed on 06/18/1986US Classes:530/356, Collagen424/94.64, Serene proteinases (3.4.21) (e.g., trypsin, chymotrypsin, plasmin, thrombin, elastase, kallikrein, fibrinolysin, streptokinease, etc.)424/485, Natural gums, resin or latex523/105, Nonmedicated composition specifically intended for contact with living animal tissue or process of preparing; other than apparel523/111Compositions for use in tape adhesives, binder or impregnate for a body fluid adsorbent device, e.g., a surgical adhesive tape, etc.ExaminersPrimary: Kight, JohnAssistant: Nutter, Nathan M. Attorney, Agent or FirmInternational ClassesA23J 001/10C08H 001/06 AbstractThis invention relates to a biodegradable collagen matrix having a pore size and morphology which enhances the healing of a wound. It further relates to a process for preparing the matrix. One embodiment of the invention comprises a biodegradable matrix which comprises collagen, hyaluronic acid and fibronectin. Other embodiments include a process which comprises freeze drying a dispersion containing collagen, crosslinking the collagen via two crosslinking steps and freeze drying the crosslinked matrix.Field of SearchCollagenProtein or biologically active polypeptide DNRM excluding wheat flour or natural cereals which may contain protein ingredient Animal derived protein or polypeptide other than casein, e.g., blood, egg albumin, etc. Nonmedicated composition specifically intended for contact with living animal tissue or process of preparing; other than apparel Compositions for use in tape adhesives, binder or impregnate for a body fluid adsorbent device, e.g., a surgical adhesive tape, etc. With ethylenically unsaturated reactant Natural gums, resin or latex Serene proteinases (3.4.21) (e.g., trypsin, chymotrypsin, plasmin, thrombin, elastase, kallikrein, fibrinolysin, streptokinease, etc.) |
| ||||||||||||||
