Num. 44.

1007

SUPPLEMENT

TO THE

NEW ZEALAND GAZETTE

OF

THURSDAY, MAY 2, 1901.

Published by Authority.

WELLINGTON, THURSDAY, MAY 2, 1901.

CONTENTS.

Complete Specifications accepted .. .. .. 1007
Provisional Specifications accepted .. .. .. 1009
Letters Patent sealed .. .. .. .. 1009
Letters Patent on which Fees have been paid .. 1009
Subsequent Proprietors of Letters Patent .. 1009
Applications for Letters Patent abandoned .. 1009
Applications for Letters Patent lapsed .. .. 1010
Letters Patent void .. .. .. .. 1010
Applications for Registration of Trade Marks .. 1010
Trade Marks registered .. .. .. .. 1012

Notice of Acceptance of Complete Specifications.

Patent Office,
Wellington, 1st May, 1901.

COMPLETE specifications relating to the under-mentioned applications for Letters Patent have been accepted, and are open to public inspection at this office. Any person may, at any time within two months from the date of this Gazette, give me notice in writing of opposition to the grant of any such patent. Such notice must set forth the particular grounds of objection, and be in duplicate. A fee of 10s. is payable thereon.

No. 13354.—30th January, 1901.—JOHN COLLINS CLANCY, Analytical Chemist and Metallurgist, and LUKE WAGSTAFF MARSLAND, Solicitor, both of Mutual Life of New York Buildings, Martin Place, Sydney, New South Wales. Improvements in the extraction of gold, silver, lead, zinc, and other metals from sulphide ores.*

Claims.—(1.) First, our described process for the extraction and recovery of gold, silver, lead, zinc, and other metals from sulphide ores, consisting essentially in the following step-by-step operations: (a) Heating the ore with the addition or admixture of lead-sulphate in a furnace wherein hot air is blown through the mixture under pressure so as to convert the lead and zinc and other volatile metals contained in said mixture more or less wholly into fume; (b) collecting the fume and the gaseous products of decomposition of the ore in a sulphuric-acid chamber, thereby causing the sulphuric acid formed from the sulphurous-acid gas evolved from the ore in the furnace to convert the fumed metallic oxides into their corresponding sulphates, or in the alternative passing the fume and the gaseous products into a vat or vessel containing sulphuric acid, and there arresting the fumed metallic oxides as sulphates and afterwards converting the sulphurous-acid gas into sulphuric acid; (c) recovering the metallic contents from the residue remaining in the furnace either (1) by pulverising and concentrating the same and then smelting the concentrate thus produced, or (2) by smelting the whole of the residual matter in the furnace in which the ore has been treated, or in any other furnace adapted for smelting purposes, all substantially as and for the purposes set forth. (2.) In extracting metals from sulphide ores, roasting or heating the sulphide ore, with the addition or admixture of lead-sulphate thereto in quantity proportional to the atomic reacting weight of the lead-sulphate upon the metallic sulphide contained in the ore, in any kind of furnace or receptacle at such degree of temperature as will convert the whole or nearly the whole of the lead and zinc and other volatile metals into fume, substantially as described and explained. (3.) In extracting metals from sulphide ores, roasting or heating the sulphide ore with the addition or admixture of lead-sulphate thereto in any quantity in any kind of furnace or receptacle at such degree of temperature as will convert the required quantity of the lead and zinc into fume, substantially as described and explained. (4.) In extracting metals from sulphide ores, recovering the metallic contents from the residue after treatment, as set out in the preceding (second) claiming clause hereof, by concentration and smelting and refining the product, substantially as described and explained. (5.) In extracting metals from sulphide ores, recovering the metallic contents from the residue after treatment as set out in the preceding (second and third) claiming clauses hereof, by smelting the same in the same furnace or in any other smelting-furnace, and withdrawing the bullion ready for refining, substantially as described and explained.
(Specification, 5s.)

No. 13469.—11th March, 1901.—JOHN DOWNS, of New Plymouth, New Zealand, Engine-fitter. An improvement in spark-arresters for locomotives.

Claims.—In a spark-arrester for locomotives, a perforated iron plate rigidly fixed across the smoke-box above the boiler-tubes. In a spark-arrester for locomotives, the exhaust-pipe lengthened nearly to the top of the chimney or