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Legal status
Patent expired
| (51) | INT.CL.: (2006.01) |
C01B 33/00 D21H 17/00 D21H 23/00 |
| (11) | Number of the document | 3224 |
| (13) | Kind of document | B |
| (21) | Application number | IP445 |
| (22) | Date of filing the application | 1993-03-19 |
| (41) | Date of publication of the application | 1994-10-25 |
| (45) | Date of publication of patent | 1995-04-25 |
| (30) | Number | Date | Country code |
| 8903753 | 1989-11-09 | SE | |
| PCT/SE90/00689 | 1990-10-24 | WO |
| (71) |
Eka Nobel AB,
S-445 80 Bohus,
SE
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| (72) |
Hans Erik JOHANSSON, SE
Bo Valdemar LARSSON, SE |
| (73) |
Eka Nobel AB,
S-445 80 Bohus,
SE
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| (74) |
Marius JAKULIS - JASON,
AAA Law, A. Goštauto g. 40B, Verslo centras "Dvyniai", LT-03163 Vilnius,
LT
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| (54) | SILICA SOLS, A PROCESS FOR THE PRODUCTION AND USE THEM |
| Payment date | Validity (years) | Amount | |
| 2012-03-01 | 20 | 1200.00 LTL |
| Patent expired | ||
| Invalidation date | 2013-03-19 |