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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
D21C 9/00 D21C 9/10 D21C 9/147 D21C 9/16 |
| (11) | Number of the document | 3393 |
| (13) | Kind of document | B |
| (21) | Application number | IP754 |
| (22) | Date of filing the application | 1993-07-02 |
| (41) | Date of publication of the application | 1995-01-31 |
| (45) | Date of publication of patent | 1995-08-25 |
| (30) | Number | Date | Country code |
| 2494/89 | 1989-10-30 | AT | |
| 2588/89 | 1989-11-10 | AT | |
| 4831464 | 1990-10-29 | SU |
| (71) |
LENZING AKTIENGESELLSCHAFT,
Werkstrasse, A-4860 Lenzing,
AT
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| (72) |
Walter PETER, AT
Oskar HOEGLINGER, AT Herbert SIXTA, AT Gerhard GOETZINGER, AT Peter HENDEL, AT Wilfried RUECKL, AT Friedrich KURZ, AT Alfred SCHRITTWIESER, AT Manfred SCHNEEWEISZ, AT |
| (73) |
LENZING AKTIENGESELLSCHAFT,
Werkstrasse, A-4860 Lenzing,
AT
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| (74) |
dr. Nijolė Viktorija MICKEVIČIENĖ,
Panerių g. 79a, LT-48425 Kaunas,
LT
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| (54) | PROCESS FOR BLEACHING OF CELLULOSE EXCLUDING THE USE OF CHLORINE |
| Payment date | Validity (years) | Amount | |
| 2000-06-19 | 8 | 640.00 LTL |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 2001-07-02 |