[D8954ABF], Letter from Dyer and Seely to Thomas Alva Edison, March 11th, 1889

Item

Abstract

Referring to your foreign ore milling patents , Set 89, the Patent Office of Norway has required the application to be divided into three divisions, one division to cover the first three claims of the present application, that is to say-- to contain the construction of the copper, the use of an air current on the falling material, the use of a bar magnet, the method of separating by depositing a particle of iron on the gold particle and then using the magnetic separator, and the method of treating hemmatite ores by heating the same to make them magnetic after pulverizing, and the separating byy magnetic attraction.##The second appliccation is to contain the method of treating sulphrets by nitric acid and nitrate of mercury, and the use of a centrifugal drier for saving the acid.##The third application is to be on the mechanical method of separating the crystals in oolithic iron ores.##The Norwegian Patent Office gives us only until March 19th, to act in this matter so we shall be glad of your instructions immediately as to whether you wish to limit yourself to the subject of your first three claims as above stated or to file separate applications for both the other matters, or for one of them. We shall have to cable instructions to Paris in this matter so kindly reply at once.##The patent Office of Germany has made the same requirement of division. Please instruct us also as to what is to be done with the German application. We have until April 5th in the German case so there is not so much haste about this. Yours truly, Dyer & Seely <TAE marg: Gen1st claim & oolithic iron Leave out gold in Norway>

Date

1889-03-11

Decade

1880-1889

Type

Identifier

D8954ABF

Folder Set

D8954

Title

[D8954ABF], Letter from Dyer and Seely to Thomas Alva Edison, March 11th, 1889

Microfilm ID

127:236

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University

Item sets