Patents by Inventor Lawrence J. Joffre

Lawrence J. Joffre 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 selective control of Zwitterionic amphoteric compositions
    Patent number: 5922909
    Abstract: A selective process for the preparation of N-alkyl-beta aminopropionic acids (1) and N-alkyl-beta-iminodipropionic acids (II)RNHC.sub.2 H.sub.4 COOH (I)RNH(C.sub.2 H.sub.4 COOH).sub.2 (II)wherein R is a C.sub.8 to C.sub.24 hydrocarbon, said process comprising reacting an alpha, beta-unsaturated carboxylic acid in aqueous media with the corresponding primary amine of the formula R.sub.1 NH.sub.2 wherein R.sub.1 is a fatty group having 8 to 24 carbon atoms, in the presence of an organic or inorganic base having a pKb of>1<15, whereby the pH of the reaction is maintained in a range of from about 3.5 to about 5.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: July 13, 1999
    Assignee: Akzo Nobel nv
    Inventor: Lawrence J. Joffre