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:
May. 28, 2013
Filed:
Aug. 17, 2006
Ralf Kretzschmar, Dresden, DE;
Wolfgang Hungerbach, Müllheim, DE;
Gert Bingel, Dresden, DE;
Glatt Systemtechnik GmbH, Dresden, DE;
Abstract
A method is for producing calcinated or sintered hollow bodies comprising a spherical surface, to hollow bodies produced using the method, and to the uses thereof. Calcinated or sintered hollow bodies comprising a spherically curved surface, an enlarged, freely accessible surface and/or a structured surface. An organic spherical carrier is coated with a powder which forms the shell of a hollow body, and a binding agent, both contained in suspension. A heat treatment is then carried out, leading to the expulsion of organic constituents and to the sin-tering process. At least one elevation is arranged on the surface of the carrier or embodied thereon, the projection past the surface corresponding at least to the thickness of the shell of the finished sintered hollow body, taking into account the degree of shrinkage of the powder material during the sintering process. The elevation(s) is/are then removed by conversion into the gas phase of the respective material from which they are formed and/or mechanically, during the heat treatment.