Patents by Inventor Wilhelm V. Dahlhoff

Wilhelm V. Dahlhoff 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 separation and purification of oligo and polyhydroxy compounds and borate esters thereof
    Patent number: 4172195
    Abstract: A process for the separation and/or purification of oligo- and polyhydroxy compounds by introducing and subsequently eliminating protective groups, wherein oligo- and polyhydroxy compounds are reacted with bis(ethyl-pivaloyloxy)-diboroxane or ethylboroxine, optionally in inert solvents, the resulting O-ethylboranodiyl derivatives of the hydroxy compounds are separated off and the O-ethylboranodiyl protective groups are eliminated by alcoholic compounds, for example methanol or glycol.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: October 23, 1979
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Roland Koster, Wilhelm V. Dahlhoff