Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Reexamination Certificate
2007-08-07
2007-08-07
Douyon, Lorna M. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Treatment of hides, skins, feathers and animal tissues
Tanning
C008S094150
Reexamination Certificate
active
11020501
ABSTRACT:
A process of combination tannage is disclosed whereby Zirconium salt is complexed with THP salt to produce wet pink leather without using any conventional dye. The resulting leathers exhibit a shrinkage temperature of more than 100° C., and other properties comparable to those of conventionally processed leathers.
REFERENCES:
patent: 2264414 (1941-12-01), Somerville et al.
patent: 3104151 (1963-09-01), Windus et al.
patent: 4272242 (1981-06-01), Plapper et al.
patent: 5376142 (1994-12-01), Matthews et al.
Chandrabose Murugan
Fathima Nishtar Nishad
Nair Balachandran Unni
Ramasami Thirumalachari
Rao Jonnalagadda Raghava
Council of Scientific and Industrial Research
Douyon Lorna M.
Drinker Biddle & Reath LLP
Khan Amina
Monaco, Esq. Daniel A.
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