Patents by Inventor Witold Tomasik

Witold Tomasik 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).

  • Patent number: 3953512
    Abstract: The invention relates to a method of preparation of 2-aminobutanol from readily available raw materials. The method of this invention is based on the reaction between 1.2-epoxybutane or isomeric butylene halogenehydrines with ammonia. The product, isomeric aminobutanols, are, subsequently transformed into 2-ethylaziridine by means of esterification with sulphuric acid followed by treatment with alkali. 2-Ethylaziridine is then submitted to a reaction with aromatic carboxylic acid or with aromatic orthobicarboxylic acid anhydride which produces the corresponding monomeric or polymeric amide, which is transformed into 2-aminobutanol by hydrolysis.The method of this invention is a multistage one but is quite simple and employs aqueous solutions and organic solvents, such as chloroform or benzene, which may be easily recovered.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: April 27, 1976
    Assignee: Polska Akademia Nauk Instytut Chemii Organicznej
    Inventors: Czeslaw Belzecki, Witold Tomasik, Jerzy Trojnar