Patents by Inventor Guenter Helling

Guenter Helling 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).

  • Image-receiving element for the dye diffusion transfer process with metal complex of diazabicyclooctane
    Patent number: 4383021
    Abstract: Nickel complexes of diazabicyclooctane derivatives of one of the following formulae I and II are useful metallizing agents for the formation of metal complexed image dyes in image receiving elements for the dye diffusion transfer process ##STR1## In these formulae R.sup.1 represents an n-functional aliphatic hydrocarbon radical optionally containing carbocyclic or heterocyclic groups, carbonyl groups, sulphonyl groups and/or heteroatoms (O, S, N) as intermediate members;R.sup.2 and R.sup.3 represent hydrogen or alkyl;A.sup..crclbar. represents an anion; andn represents a number of from 1 to 5.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: May 10, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Peter Bergthaller, Guenter Helling, Jurgen Strauss