Year: 1887

page_text: Date of Application, 1st July. 1887.
Complete Left, 31st Mar., 1888
Complete Accepted, 30th June, 1888
A communication from abroad by JULES PIERRE NICOLAS BIDRON, of Graville, Saint
Honorine, near Havre, in the Republic of France, Manufacturer.
I WILLIAM PHILLIPS THOMPSON F.U.S. M.L.M.E. of the Agency for Foreign
Patent Solicitors, 6 Lord Street Liverpool and 6 Bank Street Manchester both in the
County of Lancaster, and 323 High Holborn in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
The present application for Provisional Protection relates to a
process for
decolourizing the extract of quebracho employed alone or in mixture. The matter
introduced for this purpose into the extract alters in nothing the quality and the
tanning capacity of the decolourized product, which can serve to tan almost any sort
of skin. To arrive at this decolourization, 1 operate in the following manner:
First. When the extract of quebracho is employed alone, it suffices to introduce
two per cent. of alum into the extract while it is boiling in the evaporating apparatus,
and that this evaporation be made. It is well to pour the two per cent. of alum slowly
into the apparatus in order that the agitator placed in the interior can perform the
mixing of the materials in a complete fashion. I obtain thus quickly the desired
result.
A
Second. I have obtained also a complete decolourization by treating the mixture as

page_text: of extract of chestnut bark, then as soon as the mixture is well effected by aid of the
agitator, to introduce the alum in the manner described above. The proportion of
alum ought to be in this case solely one per cent. of the total mixture.
I reserve to myself the following names or titles in order to designate the products
thus decolourized:
In the first case: Extract of decolourized quebracho (Extrait de quebracho
décoloré).
In the second: Compounded and decolourized tanning extract (Extrait tannant
composé et decoloré.
nal ih: 20th
C T
105

page_text: Improvements in Compounds for Use in Tanning and in the
Manufacture of the same.
A communication from abroad by JULES PIERRE NICOLAS BIDRON, of Graville, Saint
Honorine, near Havre, in the Republic of France, Manufacturer.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool and 6 Bank Street Manchester, both in
the County of Lancaster, & 323 High Holborn in the County of Middlesex, Civil
Engineer do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:
:-
The present invention relates to a process for decolorizing the extract of quebracho
employed alone or in mixture. The matter introduced for this purpose into the
extract, alters in nothing the quality and the tanning capacity of the decolorized
product, which can serve to tan almost any sort of skin. To arrive at this decolori-
zation, the operation is performed in the following manner:
First. When the extract of quebracho is employed alone, it suffices to introduco
two per cent. of alum into the extract while it is boiling in the evaporating apparatus,
and then to complete the evaporation. It is well to pour the two per cent. of alum
slowly into the apparatus in order that the agitator placed in the interior can perform
the mixing of the materials in a complete fashion. The desired result is thus quickly
obtained.
Second. A complete decolorization has also been obtained by treating the following
mixtur
To obtain a complete mixture, it suffices to leave in the evaporating apparatus a
certain quantity of boiling quebracho (extract), and adding to it the same quantity of
extract of chestnut bark, then as soon as the mixing is thoroughly effected by aid of
the agitator, to introduce the alum in the manner described above. The proportion
of alum, ought to be, in this case only, one per cent. of the total mixture.
The right is reserved of using the following names or titles in order to designate
the products thus decolorized.
In the first case: Extract of decolorized quebracho (Extrait de quebracho
décoloré).

page_text: In the second: Compounded and decolorized tanning extract (Extrait tannant
composé et decoloré.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed as communicated to me by my foreign
correspondent, I declare that what I claim is :-
:-
1. As a new compound for tanning purposes, a decolorized extract of quebracho,
decolorized by the action of alum upon the colored extract while the latter is in a
boiling state.
2. As a new compound for tanning purposes, a mixture of equal parts of extract of
quebracho and of extract of chestnut bark, decolorized by the action of alum upon the
colored mixture, while the latter is in a boiling state.
3. The process for obtaining a decolorized extract of quebracho for tanning
purposes, which consists in thoroughly mixing about two per cent. of alum with the
colored extract, while it is boiling in the evaporating apparatus, and in afterwards
evaporating the mixture, substantially as described.
4. The process of obtaining a decolorized tanning compound, by adding to a boiling
mixture of equal quantities of extract of quebracho and extract of chestnut bark,
about one per cent. of alum, and by then evaporating the whole, substantially as
described.