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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
C01G 37/00 C22B 34/00 |
| (11) | Number of the document | 3677 |
| (13) | Kind of document | B |
| (21) | Application number | IP977 |
| (22) | Date of filing the application | 1993-09-15 |
| (41) | Date of publication of the application | 1995-04-25 |
| (45) | Date of publication of patent | 1996-01-25 |
| (30) | Number | Date | Country code |
| 20242/90 | 1990-05-09 | IT | |
| PCT/IT91/00034 | 1991-04-29 | WO |
| (71) |
LUIGI STOPPANI S. p. A.,
Corso Magenta 85, I-20123 Milano,
IT
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| (72) |
Giuseppe BRUZZONE, IT
Diego PERRONE, IT Alfredo PARODI, IT |
| (73) |
LUIGI STOPPANI S. p. A.,
Corso Magenta 85, I-20123 Milano,
IT
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| (74) |
Reda ŽABOLIENĖ,
METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius,
LT
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| (54) | A PROCESS AND PLANT FOR THE PREPARATION OF ALKALINE CHROMATES FROM CHROMIUM MINERALS |
| Payment date | Validity (years) | Amount | |
| 1999-09-08 | 7 | 560.00 LTL |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 2000-09-15 |