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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
B28D 1/14 E02F 3/18 E21B 10/00 E21B 10/08 E21B 10/46 E21B 17/00 |
| (11) | Number of the document | 3831 |
| (13) | Kind of document | B |
| (21) | Application number | IP1767 |
| (22) | Date of filing the application | 1994-01-13 |
| (41) | Date of publication of the application | 1995-07-25 |
| (45) | Date of publication of patent | 1996-04-25 |
| (30) | Number | Date | Country code |
| 767225 | 1991-09-27 | US | |
| 5010529 | 1991-12-26 | SU |
| (71) |
NORVIC S. A.,
c/o Me Andrey Notaires, 1, Rue Hans Fries, 1700 Fribourg,
CH
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| (72) |
Oscar William KAALSTADT, US
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| (73) |
NORVIC S. A.,
c/o Me Andrey Notaires, 1, Rue Hans Fries, 1700 Fribourg,
CH
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| (74) |
Reda ŽABOLIENĖ,
METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius,
LT
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| (54) | DISC DRILL BIT |
| Payment date | Validity (years) | Amount | |
| 1996-01-08 | 3 | 70.00 USD |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1997-01-13 |