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US 4,412,947 AGranted
Collagen sponge
AssigneeSeton Company
InventorGheorghe Cioca
Life of this patent
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Abstract
A process for preparing a coherent porous collagen sheet material is comprised of forming natural insoluble particulate collagen in substantially pure form and suspending the particulate collagen in a weak aqueous organic acid solution while maintaining the collagen in particulate form. The suspension is freeze-dried to form a coherent porous native collagen sheet material which is useful as a wound dressing, burn dressing, hemostatic sheet or the like.
Claims9
A process of preparing a coherent, porous collagen sheet material comprising:
- forming natural insoluble particulate collagen in substantially pure form;
- suspending said particulate collagen in a weak aqueous organic acid solution while maintaining said collagen in particulate form;
- and
- freeze-drying said suspension to form a coherent, porous native collagen sheet material.
1 more element
Dependencies are inferred from the claim text.