Patents by Inventor Jurgen Sander

Jurgen Sander 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).

  • Acid degradable radiation-sensitive mixture
    Patent number: 4250247
    Abstract: This invention relates to an improvement in a radiation-sensitive mixture containing (a) a compound which forms an acid under the influence of actinic radiation and (b) a compound which has at least one acid-cleavable bond and the solubility of which in a liquid developer is increased by the action of an acid, the improvement that the compound which is capable of being cleft by an acid contains at least one N-acyliminocarbonate group as the acid-cleavable group. The invention also relates to a process for producing relief images using the radiation-sensitive mixture.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: February 10, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Sander, Gerhard Buhr, Hans Ruckert
  • Acid degradable radiation-sensitive mixture
    Patent number: 4248957
    Abstract: This invention relates to an improvement in a radiation-sensitive mixture containing (a) a compound which forms an acid under the influence of actinic radiation and (b) a compound which has at least one acid-cleavable C--O--C group and the solubility of which in a liquid developer is increased by the action of an acid, the improvement that the compound which is capable of being cleft by an acid contains at least one enol ether group as the acid-cleavable group. The invention also relates to a process for producing relief images using the radiation-sensitive mixture.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: February 3, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Sander, Detlef Skaletz, Gerhard Buhr, Gerhard Lohaus
  • Positive-working radiation-sensitive copying composition and method of using to form relief images
    Patent number: 4247611
    Abstract: This invention relates to a radiation-sensitive copying composition which comprises (a) a compound which forms an acid under the influence of actinic radiation, and (b) an organic polymeric compound which contains recurrent acetal or ketal groupings in its main chain and whose solubility in a liquid developer is increased by the action of an acid, each .alpha.-carbon atom of the alcoholic constituent of the acetal or ketal grouping of the organic polymeric compound being aliphatic. The invention also relates to a process for the production of relief images using a radiation-sensitive copying composition.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: January 27, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Sander, Gerhard Buhr, Hans Ruckert