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:
Dec. 05, 2006
Filed:
Jan. 15, 2004
Applicants:
Takashi Sawaguchi, Tokyo, JP;
Shoichiro Yano, Tokyo, JP;
Yoshitaka Morimatsu, Tokyo, JP;
Mitsuru Sakaki, Tokyo, JP;
Inventors:
Takashi Sawaguchi, Tokyo, JP;
Shoichiro Yano, Tokyo, JP;
Yoshitaka Morimatsu, Tokyo, JP;
Mitsuru Sakaki, Tokyo, JP;
Assignees:
Nihon University, Tokyo, JP;
Kokusai Microfilm Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23G 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided a method of removing acids from the surface and interior of an acetate film produced by deterioration during storage. Such methods are characterized by extracting and removing the acids from the surface and interior of the acetate film, and the extraction treatment includes solvent extraction or evacuation (heating). This method suppresses the deterioration process in the storage of the acetate film.