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Extract from the Register of European Patents

EP About this file: EP0378128

EP0378128 - Method for the selective flotation of phosphate ores [Right-click to bookmark this link]
StatusThe application has been withdrawn
Status updated on  22.11.1993
Database last updated on 18.03.2026
Most recent event   Tooltip22.11.1993Withdrawal of applicationpublished on 12.01.1994 [1994/02]
Applicant(s)For all designated states
HOECHST AKTIENGESELLSCHAFT
65926 Frankfurt am Main / DE
[N/P]
Former [1990/29]For all designated states
HOECHST AKTIENGESELLSCHAFT
D-65926 Frankfurt am Main / DE
Inventor(s)01 / Morawietz, Hans-Joachim, Dr.
Kuckucksweg 2
D-6233 Kelkheim (Taunus) / DE
02 / Ritschel, Werner, Dr.
Kohlweg 11
D-6240 Königstein/Taunus / DE
03 / Bauer, Kurt
Dessauer Weg 13
D-6092 Kelsterbach / DE
[1990/29]
Application number, filing date90100215.405.01.1990
[1990/29]
Priority number, dateDE1989390082713.01.1989         Original published format: DE 3900827
[1990/29]
Filing languageDE
Procedural languageDE
PublicationType: A3 Search report 
No.:EP0378128
Date:09.10.1991
Language:DE
[1991/41]
Type: A2 Application without search report 
No.:EP0378128
Date:24.11.1993
Language:DE
[1993/47]
Search report(s)(Supplementary) European search report - dispatched on:EP16.08.1991
ClassificationIPC:B03D1/008, B03D1/01
[1990/29]
CPC:
B03D1/01 (EP,US); B03D1/008 (EP,US); B03D2201/02 (EP,US);
B03D2201/04 (EP,US); B03D2201/06 (EP,US); B03D2203/06 (EP,US);
Y10S209/902 (EP,US) (-)
Designated contracting statesDE,   FR,   GB,   SE [1990/29]
TitleGerman:Verfahren zur selektiven Flotation von Phosphormineralien[1990/29]
English:Method for the selective flotation of phosphate ores[1990/29]
French:Procédé de flottation sélective de minerais de phosphate[1990/29]
File destroyed:12.06.1999
Examination procedure21.12.1990Examination requested  [1991/09]
30.07.1992Despatch of a communication from the examining division (Time limit: M04)
07.12.1992Reply to a communication from the examining division
17.02.1993Despatch of communication of intention to grant (Approval: No)
12.05.1993Despatch of communication of intention to grant (Approval: later approval)
17.05.1993Communication of intention to grant the patent
27.07.1993Fee for grant paid
27.07.1993Fee for publishing/printing paid
05.10.1993Application withdrawn by applicant  [1994/02]
Fees paidRenewal fee
09.12.1991Renewal fee patent year 03
11.12.1992Renewal 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[AD]   SOVIET INVENTIONS ILLUSTRATED Woche 8447 , 9 Januar 1985 Derwent Publications Ltd. ,London GB [AD]
 [AD]   CHEMICAL ABSTRACTS, vol. 106, no. 14, 6. April 1987, Columbus, Ohio, US; abstract no. 104652N, A.BREDERMAN 'Alkyl[alkenyl]succinic acid alkyl monoesters effective collectors for flotation of apatite ' Seite 141 ; [AD]
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.