Patents by Inventor Janina Siejko

Janina Siejko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of production of cellular concrete
    Patent number: 4214911
    Abstract: Cellular concrete is produced using, as filler, the sandy fraction of 80-90% SiO.sub.2 content which is a waste material from the combustion of brown coal and, as binding agent lime and cement. These raw materials are dry ground and mixed with water having a temperature of about 50.degree. C. and with a pore-producing agent. The thus obtained mixture is poured out into forms.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: July 29, 1980
    Assignee: Centralny Osrodek Badawczo-Rozwojowy Przemyslu Betonow "Cebet"
    Inventors: Janina Siejko, Hanna Jatymowicz