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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
B01D 21/01 C02F 1/54 |
| (11) | Number of the document | 3694 |
| (13) | Kind of document | B |
| (21) | Application number | IP1576 |
| (22) | Date of filing the application | 1993-12-09 |
| (41) | Date of publication of the application | 1995-06-26 |
| (45) | Date of publication of patent | 1996-02-26 |
| (30) | Number | Date | Country code |
| 285933 | 1988-12-19 | US | |
| 285940 | 1988-12-19 | US | |
| 4894743 | 1991-03-22 | SU |
| (71) |
AMERICAN CYANAMID COMPANY,
One Cyanamid Plaza, Wayne, New Jersey 07470,
US
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| (72) |
Roger Edgar NEFF, US
Joseph Jacinto PELLON, US Roderick Glyn RYLES, US |
| (73) |
AMERICAN CYANAMID COMPANY,
One Cyanamid Plaza, Wayne, New Jersey 07470,
US
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| (74) |
Reda ŽABOLIENĖ,
METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius,
LT
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| (54) | PROCESS FOR PREPARATING DELIQUESCENT ANION POLYMER FLOCCULATING AGENT |
| Payment date | Validity (years) | Amount | |
| 1998-10-09 | 6 | 480.00 LTL |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1999-12-09 |