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:
Dec. 28, 1976
Filed:
Nov. 07, 1974
Applicant:
Inventors:
Marian Briska, Boeblingen, D;
Wolfgang Hoffmeister, Gaertringen, D;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01C / ;
U.S. Cl.
CPC ...
423471 ; 2329 / ;
Abstract
Newly precipitated MnO(OH).sub.2 is either added to an NH.sub.4 F solution that has been made slightly basic or this compound is formed in the NH.sub.4 F solution by adding an Mn (II) and an Mn (VII) salt solution. MnO(OH).sub.2 absorbs As and noble metal ions. The purity obtained is 10.sup..sup.-8 per cent by weight (starting from .ltoreq.10.sup..sup.-5 per cent by weight) of NH.sub.4 F solution.
Briska, Marian. (1976). Method of purifying ammonium fluoride solutions (U.S. Patent No. 4000251). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4000251
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile