Patents by Inventor Friedhelm Hoevels

Friedhelm Hoevels 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).

  • Bisguanamine
    Patent number: 4389333
    Abstract: There are described new bisguanamines of the formula ##STR1## where n is a number from 10 to 20 and their production. The bisguanamines are stabilizers for formaldehyde solutions and have outstanding qualifications and action for this purpose.
    Type: Grant
    Filed: February 5, 1982
    Date of Patent: June 21, 1983
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Werle, Wolfgang Merk, Gerhard Pohl, Friedhelm Hoevels
  • Bisguanamines
    Patent number: 4339578
    Abstract: There are described new bisguanamines of the formula ##STR1## where n is a number from 10 to 20 and their production. The bisguanamines are stabilizers for formaldehyde solutions and have outstanding qualifications and action for this purpose.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: July 13, 1982
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Werle, Wolfgang Merk, Gerhard Pohl, Friedhelm Hoevels