Methods for forming porous-surfaced polymeric bodies
Patent 4906423 Issued on March 6, 1990. Estimated Expiration Date: 
October 23, 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.
October 23, 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 ReferencesInventorAssigneeApplicationNo. 111889 filed on 10/23/1987US Classes:264/48, Including surface treatment of porous body264/134, Coating or impregnating workpiece before molding or shaping step264/154, Making hole or aperture in article264/293, Deforming the surface only264/317Removing mold by destructionExaminersPrimary: Woo, Jay H.Assistant: Durkin, II, Jeremiah F. Attorney, Agent or FirmInternational ClassB29C 041/02AbstractA method of making a polymeric body having a porous surface by (a) applying a fluid polymeric composition to a mold surface of a leachable foam having open pores thereon, (b) curing the composition to form the polymeric body, and (c) leaching the foam from the polymeric body with a suitable solvent which does not dissolve the polymeric body. The method is especially suitable for making porous silicone elastomer bodies by using polystyrene foam as the mold material and the method is useful for forming hollow, porous-surfaced polymeric bodies, e.g. mammary and vascular prostheses. | |
