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. 24, 2026
Filed:
Jan. 13, 2021
Omya International Ag, Oftringen, CH;
Gerhard Olbert, Ludwigshafen am Rhein, DE;
Laila Raquel Pasin E Matos, Ludwigshafen am Rhein, DE;
Ekaterina Helwig, Ludwigshafen am Rhein, DE;
Omya International AG, Oftringen, CH;
Abstract
Process for the preparation of hollow spherical glass particles comprising at least SiO, AlO, and an alkali metal oxide, wherein the process comprises the preparation of precursor particles comprising at least SiO, AlO, and an alkali metal oxide by mixing the starting materials, slurrying the starting materials with water followed by spry-drying and heat-treating the obtained precursor-particles at a temperature from 1000° C. to 1800° C., preferably from 1300° C. to 1600° C. by contacting the precursor particles with at least one naked flame.