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:
Sep. 19, 2017
Filed:
Apr. 27, 2015
3m Innovative Properties Company, St. Paul, MN (US);
Tilman Zipplies, Burghausen, DE;
Klaus Hintzer, Kastl, DE;
Thorsten Gerdes, Eckersdorf, DE;
Achim Schmidt-Rodenkirchen, Bayreuth, DE;
Sebastian Seidl, Neumarkt i.d.OPf., DE;
Thomas Berger, Hirschau, DE;
3M INNOVATIVE PROPERTIES COMPANY, Saint Paul, MN (US);
Abstract
The invention relates to a process for producing free-flowing calcium fluoride particles from a diluted aqueous solution of hydrogen fluoride comprising the step of reacting the diluted aqueous solution of hydrogen fluoride with calcium carbonate particles at a temperature of less than 50° C. The invention further relates to the use of the free-flowing calcium fluoride particles for the manufacturing of anhydrous hydrogen fluoride.