| Date | Description | European Patent Bulletin date, issue number |
|---|---|---|
| 23.10.1998 | No opposition filed within time limit | published on 09.12.1998 [1998/50] |
| 31.10.1997 | (Expected) grant | published on 17.12.1997 [1997/51] |
| 13.09.1997 | Communication of intention to grant a patent | |
| 14.06.1997 | Communication of intention to grant | |
| 14.06.1997 | Communication of intention to grant a patent | |
| 07.03.1997 | Communication of intention to grant | |
| 05.03.1997 | Renewal fee | |
| 24.01.1997 | Examination report or reply | |
| 15.11.1996 | Examination report or reply | |
| 03.07.1996 | Examination report or reply | |
| 27.04.1996 | Examination report or reply | |
| 06.03.1996 | Renewal fee | |
| 08.02.1996 | Examination report or reply | |
| 04.10.1995 | First examination report | |
| 22.10.1994 | Request for examination filed | published on 14.12.1994 [1994/50] |
| 13.07.1994 | Publication of search report | published on 31.08.1994 [1994/35] |
| 29.07.1993 | Publication in section I.1 EP Bulletin | published on 15.09.1993 [1993/37] |