| Date | Description | European Patent Bulletin date, issue number |
|---|---|---|
| 24.03.1994 | Application deemed to be withdrawn | published on 11.05.1994 [1994/19] |
| 06.03.1992 | Publication in section I.1 EP Bulletin | published on 22.04.1992 [1992/17] |
| 06.03.1992 | Request for examination filed | published on 22.04.1992 [1992/17] |