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:
Nov. 22, 2011
Filed:
Dec. 26, 2008
Applicants:
Masahiko Sugimoto, Nikaho, JP;
Naoko Abe, Yamagata, JP;
Tatsuaki Ujiie, Yamagata, JP;
Shinji Kashiwagura, Yamagata, JP;
Inventors:
Masahiko Sugimoto, Nikaho, JP;
Naoko Abe, Yamagata, JP;
Tatsuaki Ujiie, Yamagata, JP;
Shinji Kashiwagura, Yamagata, JP;
Assignee:
Midori Hokuyo Co., Ltd, Yamagata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C14C 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A natural leather is treated with a tanning agent, a re-tanning agent, a dye and a greasing agent, wherein a treatment agent for inhibiting the generation of formaldehyde and acetaldehyde from the natural leather is added to the greasing step so that the natural leather is impregnated with the treatment agent. The treatment agent includes a hydrazide compound optionally together with sodium hydrogen sulfite.