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EP0257548
European procedure
Extract from the Register of European Patents
EP About this file: EP0257548
| EP0257548 - Process for the recovery of silver from zinc plant calcines and neutral or low acid leach residues with thiourea [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 07.09.1991 Database last updated on 01.01.2025 | Most recent event Tooltip | 07.09.1991 | No opposition filed within time limit | published on 30.10.1991 [1991/44] | Applicant(s) | For all designated states NORANDA INC. P.O. Box 45 Suite 4500 Commerce Court West Toronto Ontario, M5L 1B6 / CA | [N/P] |
| Former [1988/09] | For all designated states NORANDA INC. P.O. Box 45 Suite 4500 Commerce Court West Toronto Ontario, M5L 1B6 / CA | Inventor(s) | 01 /
Rosato, Lucia 2195 Cambridge Street Mount Royal Quebec H3R 2Y3 / CA | 02 /
Ismay, Arnaldo 134 Windmill Pointe Claire Quebec H9R 4Y7 / CA | 03 /
Blais, Mireille 17482 Myrand Pierrefonds Quebec H9J 1G6 / CA | [1988/09] | Representative(s) | Müller-Boré & Partner Patentanwälte PartG mbB Friedenheimer Brücke 21 80639 München / DE | [N/P] |
| Former [1988/09] | Müller-Boré & Partner Patentanwälte Grafinger Strasse 2 D-81671 München / DE | Application number, filing date | 87112044.0 | 19.08.1987 | [1988/09] | Priority number, date | CA19860516850 | 26.08.1986 Original published format: CA 516850 | [1988/09] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0257548 | Date: | 02.03.1988 | Language: | EN | [1988/09] | Type: | B1 Patent specification | No.: | EP0257548 | Date: | 07.11.1990 | Language: | EN | [1990/45] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 30.11.1987 | Classification | IPC: | C22B3/00, C22B11/00 | [1990/45] | CPC: |
C01G5/003 (EP);
C22B3/42 (EP,US);
C22B11/04 (EP);
C22B3/24 (EP,US);
Y02P10/20 (EP)
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| Former IPC [1988/09] | C22B11/04 | Designated contracting states | BE, DE, ES, NL [1988/09] | Title | German: | Verfahren zum Gewinnen von Silber aus Röstblende und aus Rückständen der neutralen oder schwach sauren Zinklaugung mittels Thioharnstoff | [1990/45] | English: | Process for the recovery of silver from zinc plant calcines and neutral or low acid leach residues with thiourea | [1988/09] | French: | Procédé d'obtention d'argent à partir de calcine de zinc et de résidus de la lixiviation neutre ou faiblement acide par traitement à l'aide de thiourée | [1988/09] |
| Former [1988/09] | Verfahren zum Gewinnen von Silber aus Röstblende und aus Rückständen der neutralen oder schwachen säuren Zinklaugung mittels Thioharnstoff | Examination procedure | 26.04.1988 | Examination requested [1988/26] | 20.09.1989 | Despatch of a communication from the examining division (Time limit: M04) | 13.12.1989 | Reply to a communication from the examining division | 01.02.1990 | Despatch of communication of intention to grant (Approval: No) | 26.03.1990 | Despatch of communication of intention to grant (Approval: later approval) | 06.04.1990 | Communication of intention to grant the patent | 08.06.1990 | Fee for grant paid | 08.06.1990 | Fee for publishing/printing paid | Opposition(s) | 08.08.1991 | No opposition filed within time limit [1991/44] | Fees paid | Renewal fee | 24.08.1989 | Renewal fee patent year 03 | 13.08.1990 | Renewal fee patent year 04 |
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| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | [A]DE543304 (IG FARBENINDUSTRIE AG); | [AD]US4145212 (BODSON FERNAND J J); | [X]GB2077247 (SALSIGNE MINES PROD CHIM); | [A]DE3407049 (SUEDDEUTSCHE KALKSTICKSTOFF [DE]); | [A]US4561947 (SCHULZE REINHOLD [DE]) | [A] - F. PAWLEK "Metallhüttenkunde", 1983, pages 676-681, Walter de gruyter, Berlin-New York |