| Date | Description | European Patent Bulletin date, issue number |
|---|---|---|
| 04.07.2008 | Change - applicant | published on 06.08.2008 [2008/32] |
| 27.09.1994 | Application deemed to be withdrawn | published on 17.11.1994 [1994/46] |
| 07.04.1993 | First examination report | |
| 09.01.1993 | Change - applicant | published on 03.03.1993 [1993/09] |
| 12.10.1992 | Change - name/address | published on 02.12.1992 [1992/49] |
| 22.06.1990 | Request for examination filed | published on 08.08.1990 [1990/32] |
| 31.05.1990 | Publication of search report | published on 18.07.1990 [1990/29] |
| 08.05.1990 | Change - classification | published on 27.06.1990 [1990/26] |
| 04.05.1990 | Change - classification | published on 20.06.1990 [1990/25] |
| 04.05.1990 | Change - classification | published on 20.06.1990 [1990/25] |
| 21.10.1989 | Publication in section I.1 EP Bulletin | published on 06.12.1989 [1989/49] |