| 5438052 |
Cephalosporin derivatives |
Peter Angehrn, Paul Hebeisen, Werner Hofheinz, Helmut D. Link |
1995-08-01 |
| 5359057 |
Acylation of amines |
Urs Weiss |
1994-10-25 |
| 5055572 |
Cephalosporin derivatives |
Erwin Gotschi, Paul Hebeisen, Werner Hofheinz, Helmut D. Link |
1991-10-08 |
| 4948898 |
Process for the manufacture of 1-sulpho-2-oxoazetidine derivatives |
Werner Hofheinz, Christian Hubschwerlen, Hans P. Isenring |
1990-08-14 |
| 4816582 |
Antimicrobial 2-oxo-1-azetidinesulphonic acids |
Werner Hofheinz, Christian Hubschwerlen, Hans P. Isenring |
1989-03-28 |
| 4716227 |
Process for manufacturing cephalosporin esters |
— |
1987-12-29 |
| 4652651 |
Process for the manufacture of 1-sulpho-2-oxoazetidine carboxylic acid intermediates via catalytic ester cleavage |
Werner Hofheinz, Christian Hubschwerlen, Hans P. Isenring |
1987-03-24 |
| 4482551 |
Cephalosporin derivatives |
Paul Lanz |
1984-11-13 |
