| Date | Description | European Patent Bulletin date, issue number |
|---|---|---|
| 04.07.2008 | Change - applicant | published on 06.08.2008 [2008/32] |
| 07.03.1997 | Lapse of the patent in a contracting state | published on 23.04.1997 [1997/17] |
| 14.08.1993 | No opposition filed within time limit | published on 06.10.1993 [1993/40] |
| 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] |
| 28.08.1992 | (Expected) grant | published on 14.10.1992 [1992/42] |
| 04.04.1991 | First examination report | |
| 07.02.1990 | Request for examination filed | published on 28.03.1990 [1990/13] |
| 21.10.1989 | Publication in section I.1 EP Bulletin | published on 06.12.1989 [1989/49] |