Founding of OPTUL Sieglinde Ullmann based in Alderbach
Production and sales of the glass product range OPTUL Quality Jewels.
Introduction of the color glasses OPTUL FLOAT, which can be fused with Float glass.
The individually owned enterprise OPTUL-Sieglinde Ullmann is converted to OPTUL Spezialglas GmbH.
Sieglinde and Ursula Ullmann are participating managing directors.
Hubertus Ullmann, mentor and product developer at OPTUL Spezialglas GmbH, dies at the age of 79.
Transfer of the glass product range OPTUL Quality Jewels to Ullmannglass Norbert Ullmann e.K. in Osterhofen.
TGK GmbH in Schloß Holte-Stukenbrock takes over the commercialization of the entire Iris Arc product range, above all that of OPTUL FLOAT.
Sieglinde Ullmann, involved in finances and welcoming guests, dies at the age of 89.
Ursula Ullmann closes OPTUL Spezialglas GmbH. The GmbH is in liquidation until June 23, 2021.
HAJ drcení s.r.o. in Novy Bor takes over the logistics and the crushing and sieving work.
Quality assurance, development of new products for float glass, hands-on weekends and training courses will remain Ursula Ullmann's job.