| (11) | Number of the document | 456 |
| (21) | Number of the application | 95-0213 |
| (22) | Filing date of the application | 1995.03.28 |
| | Date of filing the request for examination | (pe raspunderea solicitantului) 05.01.1996 |
| (71) | Name(s) of applicant(s), code of the country | UNIVERSITATEA DE STAT DIN MOLDOVA, MD; |
| (72) | Name(s) of inventor(s), code of the country | DUCA Gheorghe, MD; GONTA Maria, MD; |
| (73) | Name(s) of owner(s), code of the country | UNIVERSITATEA DE STAT DIN MOLDOVA, MD; |
| (54) | Title of the invention | Method for nitrit - ion polluted water purification |
| (13) | Kind-of-document code | |
| (51) | International Patent Classification | C02F 1/70 (2006.01); |
| (19) | Country | MD |
| (45) | Date of publication of patent granting decision: | 1996.08.31 |
| (47) | Date of issuance of patent | 1997.04.15 |
| | Payment for maintenance up to the date | 1998.03.28 |
| | Date of patent termination | 1998.03.28 |
| | Date of publication of the termination of patent, with the right of restoration | 1998.11.30 |
| | Date of publication of the termination of patent, without the right of restoration | 1999.12.31 |