Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Reexamination Certificate
2005-07-05
2005-07-05
Vargot, Mathieu D. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
C249S114100, C249S115000, C249S134000, C264S002500, C425S808000, C427S133000
Reexamination Certificate
active
06913715
ABSTRACT:
This invention relates to the preparation of molds for the production of contact lenses and other ophthalmic articles. By using an inorganic material to coat the optical surfaces and sidewalls of mold parts made from clear-resin materials, manufacturers can produce lens molds with greater dimensional stability and chemical resistance. In addition to protecting the clear resin from interaction with otherwise reactive monomers from which the molded article is made, such coatings can also be used to achieve preferential release of the molded article. The resulting mold is especially useful for providing an economical way to improve manufacturing quality of contact lenses.
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Patent Abstracts of Japan; vol. 007, No. 275 (M-261), Dec. 8, 1983 & JP 58 153608 A (Sumitomo Bakelite KK), Sep. 12, 1983 abstract.
Huang Horngyih
Lai Yu Chin
Li Hongwen
Ruscio Dominic V.
Bausch & Lomb Incorporated
Thomas John E.
Vargot Mathieu D.
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