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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
B23H 7/08 C22F 1/00 C22F 1/08 |
| (11) | Number of the document | 3639 |
| (13) | Kind of document | B |
| (21) | Application number | IP1490 |
| (22) | Date of filing the application | 1993-11-25 |
| (41) | Date of publication of the application | 1995-06-26 |
| (45) | Date of publication of patent | 1996-01-25 |
| (30) | Number | Date | Country code |
| 88104897 | 1988-03-26 | EP | |
| 4613718 | 1989-03-22 | SU |
| (71) |
Berkenhoff GmbH,
Berkenhoffstrasse 14, DW-6301 Heuchelheim,
DE
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| (72) |
Hans HERMANNI, DE
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| (73) |
Berkenhoff GmbH,
Berkenhoffstrasse 14, DW-6301 Heuchelheim,
DE
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| (74) |
Rita LAURINAVIČIŪTĖ,
Gedimino pr. 45-6, LT-01109 Vilnius,
LT
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| (54) | METHOD FOR PREPARATING OF WIRE ELECTRODE FOR SPARKMACHINING OF ARTICLE |
| Payment date | Validity (years) | Amount | |
| 1998-11-05 | 6 | 480.00 LTL |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1999-11-25 |