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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
B01J 23/16 C07B 61/00 C07C 5/00 C07C 7/00 C07C 11/00 C07C 41/00 C07C 43/00 |
| (11) | Number of the document | 3984 |
| (13) | Kind of document | B |
| (21) | Application number | IP1827 |
| (22) | Date of filing the application | 1994-01-28 |
| (41) | Date of publication of the application | 1995-08-25 |
| (45) | Date of publication of patent | 1996-06-25 |
| (30) | Number | Date | Country code |
| 91 A 000519 | 1991-02-28 | IT | |
| 5010201 | 1991-12-02 | SU |
| (71) |
SNAMPROGETTI S. p. A.,
Corso Venezia 16, Milan,
IT
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| (72) |
Ivano MIRACCA, IT
Giorgio FUSCO, IT |
| (73) |
SNAMPROGETTI S. p. A.,
Corso Venezia 16, Milan,
IT
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| (74) |
Reda ŽABOLIENĖ,
METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius,
LT
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| (54) | METHOD FOR PREPARING ISOBUTENE AND ALKYL-TRET.-BUTYLETHER |
| Payment date | Validity (years) | Amount | |
| 1998-01-26 | 5 | 100.00 USD |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1999-01-28 |