Hydrophilic, water-swellable, crosslinked, copolymer gel and prosthesis employing same
Patent 4138382 Issued on February 6, 1979. Estimated Expiration Date: 
May 1, 1998. 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.
May 1, 1998. 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 2820798 3004950 InventorAssigneeApplicationNo. 05/901954 filed on 05/01/1978US Classes:523/113, Composition suitable for use as tissue or body member replacement, restorative, or implant524/458, Polymerizing in the presence of water and in the presence of a solid polymer derived from ethylenic reactants only524/533, Ethylenic monomer contains at least one carboxylic acid ester group524/535, Ethylenic monomer contains at least one atom which is other than C, H, or O524/806, Silicon-containing monomer526/279, From monomer containing a silicon atom528/32, Silicon reactant contains an ethylenically unsaturated group623/7BREAST PROSTHESISExaminersPrimary: Michl, Paul R.Attorney, Agent or FirmInternational ClassesA61F 2/12 (20060101)A61L 27/00 (20060101) A61L 27/52 (20060101) A61L 27/16 (20060101) C08F 230/00 (20060101) C08F 230/08 (20060101) AbstractA hydrophilic, water-swellable, crosslinked gel is produced by copolymerizing a water soluble vinylic constituent in aqueous solution with olefinic hydrolyzable silanes which contain low molecular weight alkoxy groups. Copolymerization is via the unsaturated groups and crosslinking is by condensation reactions. The copolymer is swellable to a finite extent or to an infinite extent depending upon the water/vinylic monomer volume ratio and upon the vinylic monomer:silane mole ratio. Non-toxic embodiments of the gel are especially useful as prosthesis fillers. Such gels can be used to fill the prosthesis before implantation or the prosthesis can be swollen with an aqueous solution after implantation. | |
