Patents by Inventor Joachim Lobering

Joachim Lobering 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: 4119611
    Abstract: A two-stage process for making a linear condensate of phenol and formaldehyde which can be extruded as a film or thread. In the first stage phenol and formaldehyde are reacted at about 90.degree. C to produce a clear low-viscosity phenol-methylol liquid, the pH of which is adjusted to a value greater than 3, say between 3.5 and 7. In the second stage the product of the first stage is added in aliquot portions to molten phenol having a pH of 3 or less, while maintaining the temperature at about 100.degree. C. After all the phenol-methylol has been added the mixture is slowly heated as the viscosity increases up to about 150.degree. C until there is no further increase in viscosity. The highly viscous end product can be extruded as a film or thread.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: October 10, 1978
    Assignee: Zimmer Aktiengesellschaft
    Inventor: Joachim Lobering