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US 6,582,631 B1Granted
Method for cast molding contact lenses
AssigneeNovartis AG
InventorThomas Shepard
Life of this patent
Estimating the term…
Abstract
An improved method of cast molding contact lenses, wherein a lens forming mixture is cured in the lens-shaped cavity formed between molding surfaces of a male and female mold sections, wherein the improvement comprises at least one of sections is injection molded from a metallocene-catalyzed thermoplastic polyolefin.
Claims2
An improved method of cast molding contact lenses, wherein a lens forming mixture is cured in the lens-shaped cavity formed between molding surfaces of a male and female mold sections,
- wherein the improvement comprises at least one of sections is injection molded from a metallocene-catalyzed thermoplastic polyolefin having narrow molecular weight distribution, narrow composition distribution and narrow tacticity distribution.
Dependencies are inferred from the claim text.