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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
C01B 33/00 |
| (11) | Number of the document | 3795 |
| (13) | Kind of document | B |
| (21) | Application number | IP1436 |
| (22) | Date of filing the application | 1993-11-05 |
| (41) | Date of publication of the application | 1995-05-25 |
| (45) | Date of publication of patent | 1996-03-25 |
| (30) | Number | Date | Country code |
| 39 35 464.4 | 1989-10-25 | DE | |
| 40 04 624.9 | 1990-02-15 | DE | |
| 4831290 | 1990-10-24 | SU |
| (71) |
HOECHST AKTIENGESELLSCHAFT,
D-65926 Frankfurt am Main,
DE
|
| (72) |
Guenther SCHIMMEL, DE
Michael KOTZIAN, DE Herbert PANTER, DE Alexander TAPPER, DE |
| (73) |
HOECHST AKTIENGESELLSCHAFT,
D-65926 Frankfurt am Main,
DE
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| (74) |
Reda ŽABOLIENĖ,
METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius,
LT
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| (54) | PROCESS FOR THE PRODUCTION OF SODIUM SILICATES |
| Payment date | Validity (years) | Amount | |
| 1998-10-30 | 6 | 480.00 LTL |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1999-11-05 |