Patents by Inventor Jacques Marie Van De Putte

Jacques Marie Van De Putte 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).

  • Process for the manufacture of carboxylated polyethylenimines
    Patent number: 4064078
    Abstract: Carboxylated polyethylenimines are prepared by dissolving in an inert solvent a compound of formula: ##STR1## wherein: R represents an alkyl or an aryl group,Each of R', R", and R'" represents hydrogen or methyl, andR.sup.iv represents an alkyl group.The solution is then treated between -30.degree. and 25.degree. C with a polymerization initiator. After hydrolysis the polymer yields a polyamino acid which is an amphoteric product. They may be added as plasticizers to gelatin in photographic layers.
    Type: Grant
    Filed: December 1, 1972
    Date of Patent: December 20, 1977
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Georges Joseph Smets, Jacques Marie Van De Putte