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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
E21B 43/00 B01D 29/11 E21B 43/02 |
| (11) | Number of the document | 3088 |
| (13) | Kind of document | B |
| (21) | Application number | IP260 |
| (22) | Date of filing the application | 1992-12-28 |
| (41) | Date of publication of the application | 1994-03-25 |
| (45) | Date of publication of patent | 1994-11-25 |
| (30) | Number | Date | Country code |
| 3-360494 | 1991-12-27 | JP |
| (71) |
NAGAOKA INTERNATIONAL CORPORATION,
2-2-91, Mokuzaidori, Mihara-machi, Minami Kawachi-gun, Osaka-fu,
JP
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| (72) |
Tadayoshi NAGAOKA, JP
Derry D. SPARLIN, US |
| (73) |
NAGAOKA INTERNATIONAL CORPORATION,
2-2-91, Mokuzaidori, Mihara-machi, Minami Kawachi-gun, Osaka-fu,
JP
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| (74) |
Rita LAURINAVIČIŪTĖ,
Gedimino pr. 45-6, LT-01109 Vilnius,
LT
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| (54) | METHOD OF MANUFACTURING A SELECTIVE ISOLATION SCREEN |
| Payment date | Validity (years) | Amount | |
| 1995-12-08 | 4 | 80.00 USD |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1996-12-28 |