| Date | Description | European Patent Bulletin date, issue number |
|---|---|---|
| 23.02.1994 | Application deemed to be withdrawn | published on 13.04.1994 [1994/15] |
| 17.12.1992 | Publication of search report | published on 03.02.1993 [1993/05] |
| 17.01.1992 | Publication in section I.1 EP Bulletin | published on 04.03.1992 [1992/10] |