Patents by Inventor Stefen Hoffmann

Stefen Hoffmann 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).

  • Protective or anchor groups and their use
    Patent number: 5990278
    Abstract: The invention relates to a carbamide of the general formulaR.sub.1 --CO--NH--C(R.sub.2)(R.sub.3)--X--Ywhich is protected by a temporary protective group and whereinR.sub.1 --CO means a carbonyl residue which can be provided as a unit for the chain of a peptide, and can have one or a plurality of amino acid residues;R2 and R3 mean resides of the carbamide which do not participate in their function, whereby R2 and R3 can be identical or different, but are different when one of the two residues means a hydrogen atom;X means an oxygen atom or a sulphur atom, andY means a protective group for X.The invention further relates to a process for producing the protected carbamide and to utilisation of the protected carbamide.The protected carbamide according to the invention can also be linked to a carrier material.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: November 23, 1999
    Inventors: Stefen Hoffmann, Ronald Frank