| Date | Description | European Patent Bulletin date, issue number |
|---|---|---|
| 08.03.1995 | Application deemed to be withdrawn | published on 26.04.1995 [1995/17] |
| 27.05.1992 | First examination report | |
| 08.02.1992 | Request for examination filed | published on 01.04.1992 [1992/14] |
| 05.07.1991 | Publication in section I.1 EP Bulletin | published on 21.08.1991 [1991/34] |