Stock material or miscellaneous articles – Composite – Of fluorinated addition polymer from unsaturated monomers
Reexamination Certificate
2007-01-30
2009-08-11
Chen, Vivian (Department: 1794)
Stock material or miscellaneous articles
Composite
Of fluorinated addition polymer from unsaturated monomers
C428S192000, C428S422000, C428S426000, C428S430000, C359S507000, C359S513000, C427S162000, C427S163100, C427S164000, C427S165000, C427S169000, C427S256000, C427S284000
Reexamination Certificate
active
07572507
ABSTRACT:
An optical element includes glass substrates adhered to surfaces of a birefringent material film through an adhesive. The optical element has a coating for moisture-proof. The moisture-proof treatment is performed by applying a mixed solution of a soluble fluorine resin and an ethylenic compound to end surfaces of the glass substrates and the birefringent material film. Otherwise, the optical element is dipped in a solution prepared by mixing a soluble fluorine resin and an ethylenic compound in a predetermined mixing ratio, so as to moisture-proof the end surfaces of the glass substrates and the birefringent material film. The birefringent material film is a phase difference film. The soluble fluorine resin is an amorphous fluorine resin. The ethylenic compound is PTFE.
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Kojima Tatsuya
Okubo Takuro
Takahashi Takashi
Chen Vivian
Foley & Lardner LLP
Kabushiki Kaisha Topcon
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