The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1989
Filed:
Apr. 23, 1987
Applicant:
Inventors:
Ian K Egerton, Runcorn, GB;
Andrew D Broome, Warrington, GB;
Assignee:
Laporte Industries Limited, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C09K / ; A01N / ;
U.S. Cl.
CPC ...
252397 ; 106 1505 ; 252607 ; 423595 ; 423602 ; 423604 ; 424133 ; 424137 ; 424140 ;
Abstract
A copper arsenate composition suitable for incorporation in a copper/chrome/arsenic wood preservative composition is made by reacting copper metal with a source of 5-valent arsenic such as arsenic acid under the oxidizing influence of hydrogen peroxide. The quantity of arsenic acid used may be made consistent with the arsenic to copper ratio required in the final wood preservative composition which may be made up by including a suitable source of chromium with the copper arsenate reaction product.