Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Treatment of untanned skins or hides
Reexamination Certificate
2011-08-23
2011-08-23
Douyon, Lorna M (Department: 1761)
Bleaching and dyeing; fluid treatment and chemical modification
Treatment of hides, skins, feathers and animal tissues
Treatment of untanned skins or hides
C008S09419C, C252S008570
Reexamination Certificate
active
08002846
ABSTRACT:
Method for manufacturing a protein filling agent for leather utilizing animal hairs. The method includes pre-treating the animal hairs to obtain pre-treated animal hairs, wherein the pre-treating comprises soaking the animal hairs in an inorganic acid solution and a reducing agent solution. Next, the pre-treated hairs are hydrolyzed in an alkaline compound to obtain a viscous liquid and then, neutralized and dried to obtain the protein filling agent for leather.
REFERENCES:
patent: 2005746 (1935-06-01), Kritchevsky
patent: 5306435 (1994-04-01), Ishikawa et al.
Huang Hai-Guang
Li Guo-Ying
Liu Wen-Tao
Wang Hai-Xia
David Pai Chao-Chang
Diggs Tanisha
Douyon Lorna M
Foshan City Nanhai Zhaofu Leather Product Co., Ltd
Pai Patent & Trademark Law Firm
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