Patents by Inventor Roland Koster

Roland Koster 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
  • Process for preparing condensation products
    Patent number: 4010204
    Abstract: A condensation according to the following equation ##STR1## is carried out in the presence of a dialkyl boryl carbonxylate, e.g. diethyl boryl pivalate. High yields are obtained.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: March 1, 1977
    Assignee: Studiengesellschaft Kohle m.b.H.
    Inventors: Roland Koster, Ali-Akbar Pourzal
  • Process for reacting trialkyl boranes with compounds containing protons
    Patent number: 4005132
    Abstract: Trialkyl boranes are reacted with compounds containing protons in the presence of catalytic amounts of carboxylic acid derivatives, especially derivatives of t-alkyl carboxylic acids, thereby highly increasing the rate of protolyses of trialkyl boranes. These reactions may, for example, be utilized for the borylation of H-acidic compounds or for the dehydration of salts.
    Type: Grant
    Filed: October 12, 1972
    Date of Patent: January 25, 1977
    Assignee: Studiengesellschaft Kohle m.b.H.
    Inventors: Roland Koster, Hans Bellut