The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2010
Filed:
Dec. 11, 2006
Hiroki Yokoyama, Odawara, JP;
Kazuhiro Muramasu, Odawara, JP;
Hiroki Yokoyama, Odawara, JP;
Kazuhiro Muramasu, Odawara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The present invention provides a method for alkaline saponification of a polymer film, comprising: an alkaline-solution coating step of coating a polymer film with an alkaline solution; a temperature keeping step of keeping the polymer film coated with the alkaline solution at temperature equal to or higher than room temperature; a reaction terminating step of terminating the reaction by applying a diluting solvent or an acid solution to the polymer film kept at the temperature; and a washing step of washing away the alkaline solution from the polymer film on which the reaction has been terminated, wherein the reaction terminating step uses a bar coater having a flat-surface bar to apply the diluting solvent or acid solution to the polymer film and remove the alkaline solution from the polymer film.