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US 5,314,647 AGranted
Method of making cellulose ester photographic film base
AssigneeEastman Kodak Company
InventorJohn E. Rieth
Life of this patent
Estimating the term…
Abstract
A method of making cellulose ester photographic film base employing microwave radiation for removing the final portion of solvent present in the film.
Claims9
In a method of making a cellulose ester photographic film base which comprises casting a cellulose ester polymer in a solvent onto a moving surface, stripping the film from the surface and drying in hot air the improvement which comprises removing the final portion of the solvent present in the film by subjecting the film to microwave radiation.
Dependencies are inferred from the claim text.