IMPROVEMENTS IN THE TREATMENT OF CERTAIN ORES FOR THE PRODUCTION PROVISIONAL SPFICATION
Year: 1875

page_text: LETTERS PATENT to Peter Cannel Bunn, of West Dereham, in the
County of Norfolk, Coprolite Merchant, for the Invention of
"IMPROVEMENTS IN THE TREATMENT OF CERTAIN ORES FOR THE PRODUCTION
PROVISIONAL SPECIFICATION left by the said Peter Cannell Bunn
at the Office of the Commissioners of Patents, with his Petition
on the 13th August 1875.
I, PETER CANNELL BUNN, of West Dereham, in the County of
Norfolk, Coprolite Merchant, do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN THE TREATMENT OF CERTAIN ORES FOR THE
PRODUCTION OF PIGMENTS," to be as follows:-
This Invention relates to the treatment and use of certain ferruginous
ores which occur in or near the coprolite districts, such, for example,
as those of Norfolk, and more especially those in the neighbourhood of

page_text: West Dercham and Wretton, and consists in firstly submitting such
ferruginous ores or products to a grinding process or to a grinding and
livigating process and then submitting the finely divided ore or product
to a process of calcination in order that the ferruginous materials may
become oxidized and be rendered suitable as a pigment which by
admixture with oils or other vehicles will produce and constitute a
valuable paint or composition to be employed for the coating or covering
of metallic, wooden, brick, stone, or other surfaces.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Peter Cannel Bunn in the Great Seal Patent
Office on the 5th February 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
CANNELL BUNN, of West Dercham, in the County, of Norfolk, Coprolite
Merchant, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of August, in the year
of our Lord One thousand eight hundred and seventy-five, in the
39th year of Her reign, did for Herself, Her heirs and successors,
give and grant unto me, the said Peter Cannel Bunn, Her special
license that I, the said Peter Cannell Bunn, my executors, admini-
strators, or assigns, or such others as I, the said Peter Cannell
Bunn, my executors, administrators, or assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN THE TREATMENT OF CERTAIN ORES FOR THE PRODUCTION
OF PIGMENTS," upon the condition (amongst others) that I, the said
Peter Cannell Bunn, my executors or administrators, by an instru-
ment in writing under my hand and seal, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in
the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that 1, the said Peter Cannell Bunn, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in
and by the following statement, that is to say :-
My said Invention relates to the use of and to the treatment of
certain ferruginous ores which occur in or near the coprolite districts,
such, for example, as those of Norfolk, and more especially those in the
neighbourhood of West Dereham and Wretton, and consists in firstly
submitting such ferruginous ores or products to a grinding process, or
to a grinding and levigating process, and then employing the same as
pigments, or submitting the finely divided ore or product to a process of
calcination in order that the ferruginous materials may become oxidized
and be rendered suitable to be employed as a pigment which by
admixture with oils or other vehicles will produce and constitute a
valuable paint or composition to be employed for the coating or
covering of metallic, wooden, brick, stone, or other surface.
In carrying out my said Invention I first cause the ores to be ground
or disintegrated, and if desirable submit the finely divided ore or ores to
a levigating process. The finely divided ore or ores obtained by either
of these processes may then either be ground and incorporated with oil
and be rendered suitable for being employed as a paint or covering
material, or the ore thus treated may be submitted to a calcining or
heating and oxidizing process in order that the oxides of iron thus
resulting may be rendered capable of being employed for the production
of paints or for other covering materials.
The calcining or heating furnaces may be constructed in a manner
similar to those generally employed for calcination, my object being to
effect the heating and the oxidation of the finely divided ore. The
calcined ore thus resulting is then submitted to a grinding process, and
if necessary to recalcination. The product thus obtained may then be
employed for the production of paint or for other covering material.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe in conclusion that what I consider
to be novel and original, and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is the pro-
duction of pigments in the manner herein-before described from the

page_text: peculiar ore or ores of iron containing oxides of iron which occur in the
ocalitics herein-before referred to.
In witness whercof, I, the said Peter Cannell Bunn, have to
this my Specification set my hand and seal, this Twenty-fourth
day of January, One thousand cight hundred and seventy- 5
six.
PETER CANNELL BUNN. (L.S.)