Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Reexamination Certificate
2006-04-17
2008-07-01
Chen, Vivian (Department: 1794)
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
C428S339000, C428S532000, C427S154000, C427S384000, C427S415000
Reexamination Certificate
active
07393579
ABSTRACT:
A method of film fabrication is taught that uses a coating and drying apparatus to fabricate resin films suitable for optical applications. In particular, cellulose acetate films are prepared by simultaneous application of multiple liquid layers to a moving carrier substrate. After solvent removal, the cellulose acetate films are peeled from the sacrificial carrier substrate. Cellulose acetate films prepared by the current invention exhibit good dimensional stability and low birefringence.
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Anderson Andrew J.
Chen Vivian
Eastman Kodak Company
Leipold Paul A.
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