Patents Represented by Attorney Lugher A. R. Hall

Find this attorney in the Justia Lawyer Directory

  • Photocrosslinkable polymers with side groups derived from indenone and the preparation and use of these polymers
    Patent number: 4399259
    Abstract: The invention relates to polymers which are crosslinkable under the action of light and contain side groups of the formula ##STR1## in which R.sup.3 is preferably chlorine and R, R.sup.1 and R.sup.2 are, for example, H or --CH.sub.3. The proportion of these groups in the polymers is preferably 20 to 100%. Because of their high sensitivity to light, these polymers are suitable for photographic applications.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: August 16, 1983
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans Zweifel, Joseph Berger, Hans Bosshard