Bayer Aktiengesellschaft

Schott Glaswerke

Schott Ag

Markus Steigenberger

Wulf Von Bonin

Roland Leroux

Thomas M Karschti

Markus Ring

Horst Koller

Thomas Kadur

Karl Mosimann

Horst Dipl-Ing Koller

The syringe is formed according to DIN ISO 11040 and has a syringe barrel () with a syringe head () formed on one end and a grip plate () formed at the other open end. An elastomeric piston stopper () is insertable in this open end, which is movable back and forth and which has a cruciform-cross-sectioned piston rod () screwed into it. A stop element, which reduces the interior diameter of the syringe barrel, is provided at the open end of the syringe barrel to perform a back-stop function, i.e. to prevent unintended withdrawal of the piston stopper. For this purpose a plastic part () connected to the grip plate () is provided with snap catches (), which snap onto the inner side of the syringe barrel (). These snap-catches () prevent the piston rod () from being rotated out of the piston stopper and the piston stopper () from being withdrawn from the syringe barrel. At the same time the finger support is enlarged.

Medicinal syringe with piston stopper withdrawal and rotation-limiting means

Fire-resistant glass, produced by placing between two panes of glass a gel former containing a) an acid aluminum phosphate, b) a reaction product of boric acid with an alkanolamine and one or more alkali metal compounds, and heating the glass to convert the gel former to a gel.

Fire-resistant glass containing a gel with improved melting resistance,

Gel formers comprising acid aluminum phosphate and a reaction product of boric acid and an alkanolamine, and further comprising alkali metal compounds in the aluminum: alkali metal ratio of 1:1.3-2.5 require short gelling times, and form gels having improved melting resistance.

Gel formers having reduced gelling time and forming gels with improved

Fireproofing glasses containing gels free from organic gel formers are characterized in that they have been prepared with gel formers which contain

Fireproofing glasses containing special gels and the preparation of

Growing community of inventors

Bischofsheim, Germany

Markus Steigenberger