Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2005-04-05
2005-04-05
Mullis, Jeffrey (Department: 1711)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
C525S123000, C525S242000, C525S279000, C525S302000, C428S064400
Reexamination Certificate
active
06874885
ABSTRACT:
This invention is directed to a processing approach for the rapid and efficient in-situ polymerization of specially prepared precursor mixtures to achieve near-net-shape production of objects/articles with exact dimensions. The process relies on the use of polymerizable compositions comprised of a mixture of a dead polymer, a reactive plasticizer and, optionally, an initiator, which compositions are semi-solid-like prior to curing and induce low shrinkage upon curing as a result of their partially polymerized nature prior to processing. The partially polymerized nature of the precursor mixtures also allows extremely impact-resistant objects/articles to be fabricated. Other desirable engineering property attributes can similarly be achieved via the judicious blending of starting ingredients in formulating the polymerizable (curable) mixtures.
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PCT International Search Report for appln. PCT/US99/22048.
Hino Toshiaki
Houston Michael R.
Soane David S.
Heines M. Henry
Larson Jacqueline S.
Mullis Jeffrey
ZMS LLC
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