Patents Assigned to Matematicko-fyzikalni fakulta University Karlovy v Praze
  • Method of manufacture of an electric humidity detecting sensing element
    Patent number: 4441968
    Abstract: Electric humidity detecting sensing element on the basis of a layer of porous aluminum oxide, treated by sealing in boiling water, passivation and tempering at 70.degree. to 110.degree. C., achieving thereby a substantial reduction of subsequent variations of calibrating curves. The time of tempering may range from 2 to 24 hours. A preferred average time of tempering is 8 hours, with a practical upper limit of 12 hours.
    Type: Grant
    Filed: December 1, 1981
    Date of Patent: April 10, 1984
    Assignee: Matematicko-fyzikalni fakulta University Karlovy v Praze
    Inventors: Ivan Emmer, Zdenek Hajek, Petr Repa