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US 2004/0061829 A1Published application
Method of purification of polymeric medical device materials using continuous soxhlet extraction
AssigneeBausch & Lomb Incorporated
InventorsYu-Chin Lai, Dominic V. Ruscio, David P. Vanderbilt
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Abstract
A process for removing contaminants and/or leachables from polymeric materials useful in the manufacture of biocompatible medical devices such as intraocular lenses, corneal inlays and contact lenses using continuous soxhlet extraction.
Claims15
A method of continuous soxhlet extraction for the purification of polymeric materials comprising:
- assembling a flask, an extractor with a liquid arm dimensioned to enable continuous solvent flow and a condenser;
- placing polymeric materials in said extractor and solvent in said flask;
- and
- heating said solvent to create a flow of said solvent through said condenser, extractor and flask for purification of said polymeric materials.
1 more element
Dependencies are inferred from the claim text.