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Extract from the Register of European Patents

EP About this file: EP0374671

EP0374671 - Use of selected ester oils in drilling fluids, especially for off-shore oil or gas recovery [Right-click to bookmark this link]
StatusPatent revoked
Status updated on  07.09.2001
Database last updated on 06.07.2024
Most recent event   Tooltip05.10.2005Change: Appeal number 
Applicant(s)For all designated states
Cognis Deutschland GmbH
Henkelstrasse 67
40589 Düsseldorf / DE
For all designated states
HALLIBURTON ENERGY SERVICES, INC.
4100 Clinton Drive
Houston, Texas 77020 / US
[N/P]
Former [2000/16]For all designated states
Cognis Deutschland GmbH
Henkelstrasse 67
40589 Düsseldorf / DE
For all designated states
Halliburton Energy Services, Inc.
4100 Clinton Drive
Houston, Texas 77020 / US
Former [1995/44]For all designated states
Henkel Kommanditgesellschaft auf Aktien
D-40191 Düsseldorf / DE
For all designated states
Baroid Drilling Fluids, Inc.
3000 North Sam Houston Parkway East
Houston, Texas / US
Former [1992/34]For all designated states
Henkel Kommanditgesellschaft auf Aktien
D-40191 Düsseldorf / DE
For all designated states
Baroid Drilling Fluids, Inc.
3000 North Sam Houston Parkway East
Houston, Texas / US
Former [1990/26]For all designated states
Henkel Kommanditgesellschaft auf Aktien
D-40191 Düsseldorf / DE
For all designated states
BAROID LIMITED
St. Magnus House Guild Street
Aberdeen Scotland AB1 2NJ / GB
Inventor(s)01 / Müller, Heinz
Goldregenweg 4
D-4019 Monheim / DE
02 / Herold, Claus-Peter, Dr.
Ostpreussenstrasse 26
D-4020 Mettmann / DE
03 / von Tapavicza, Stephan, Dr.
Thomas-Mann-Strasse 12
D-4006 Erkrath 2 / DE
04 / Grimes, Douglas John
12 Ledborough Lane
Beaconsfield HP9 2PZ / GB
05 / Braun, Jean-Marc
Bernstorffstrasse 34 E
D-3100 Celle / DE
06 / Smith, Stuart P. T.
Creag Ghlaf Drumoak
Banchory Kincardineshire / GB
[1990/26]
Representative(s)Uexküll & Stolberg
Partnerschaft von
Patent- und Rechtsanwälten mbB
Beselerstrasse 4
22607 Hamburg / DE
[N/P]
Former [2000/24]UEXKÜLL & STOLBERG
Patentanwälte Beselerstrasse 4
22607 Hamburg / DE
Former [2000/16]von Kreisler, Alek, Dipl.-Chem., et al
Patentanwälte von Kreisler-Selting-Werner Postfach 10 22 41
50462 Köln / DE
Former [1991/05]von Kreisler, Alek, Dipl.-Chem.
Patentanwälte von Kreisler-Selting-Werner Postfach 10 22 41
D-50462 Köln / DE
Application number, filing date89122819.911.12.1989
[1990/26]
Priority number, dateDE1988384265919.12.1988         Original published format: DE 3842659
[1990/26]
Filing languageDE
Procedural languageDE
PublicationType: A1 Application with search report 
No.:EP0374671
Date:27.06.1990
Language:DE
[1990/26]
Type: B1 Patent specification 
No.:EP0374671
Date:30.03.1994
Language:DE
[1994/13]
Search report(s)(Supplementary) European search report - dispatched on:EP07.05.1990
ClassificationIPC:C09K7/06
[1990/26]
CPC:
C09K8/34 (EP)
Designated contracting statesAT,   BE,   CH,   DE,   ES,   FR,   GB,   GR,   IT,   LI,   LU,   NL,   SE [1992/16]
Former [1990/26]GR 
TitleGerman:Verwendung ausgewählter Esteröle in Bohrspülungen insbesondere zur off-shore-Erschliessung von Erdöl- bzw. Erdgasvorkommen (l)[1990/26]
English:Use of selected ester oils in drilling fluids, especially for off-shore oil or gas recovery[1990/26]
French:Utilisation d'huiles d'esters sélectionnées, dans les fluides de forage, en particulier pour l'exploitation off-shore du pétrole ou du gaz[1990/26]
MiscellaneousEPB 1992/17: Verbunden mit 90900103.4/0448579 (europäische Anmeldenummer/Veröffentlichungsnummer) durch Entscheidung vom 05.03.92
EPB 1992/17: Consolidated with 90900103.4/0448579 (European application No./publication No.) by decision dated 05.03.92
EPB 1992/17: Jointe à la demande no. 90900103.4/0448579 (numéro de dépôt/numéro de publication de la demande européenne) par décision du 05.03.92
Examination procedure25.05.1990Examination requested  [1990/29]
31.08.1992Despatch of a communication from the examining division (Time limit: M04)
18.12.1992Reply to a communication from the examining division
24.06.1993Despatch of communication of intention to grant (Approval: Yes)
26.07.1993Communication of intention to grant the patent
12.10.1993Fee for grant paid
12.10.1993Fee for publishing/printing paid
Opposition(s)Opponent(s)01  29.12.1994  30.01.1995  ADMISSIBLE
Fina Research S.A.
Zone Industrielle C
B-7181 Seneffe (Feluy) / BE
Opponent's representative
Detrait, Jean-Claude
Total Petrochemicals Research Feluy
Zone Industrielle C
7181 Seneffe (Feluy) / BE
 [N/P]
Former [1995/09]
Opponent(s)01  29.12.1994  30.01.1995  ADMISSIBLE
Fina Research S.A.
Zone Industrielle C
B-7181 Feluy / BE
Opponent's representative
Detrait, Jean-Claude
c/o Fina Research S.A. Patent Department Zone Industrielle C
B-7181 Feluy / BE
07.03.1995Invitation to proprietor to file observations on the notice of opposition
10.08.1995Reply of patent proprietor to notice(s) of opposition
25.10.1996Despatch of communication that the patent will be revoked
08.11.2000Legal effect of revocation of patent [2001/43]
Appeal following opposition18.12.1996Appeal received No.  T0015/97
20.02.1997Statement of grounds filed
01.03.2000Interlocutory revision of appeal
01.03.2000Result of appeal procedure: appeal of the proprietor was rejected
08.11.2000Date of oral proceedings
15.11.2000Minutes of the oral proceedings despatched
24.06.1996Date of oral proceedings
25.10.1996Minutes of the oral proceedings despatched
Fees paidRenewal fee
20.12.1991Renewal fee patent year 03
23.12.1992Renewal fee patent year 04
23.12.1993Renewal fee patent year 05
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Documents cited:Search[A]EP0009746  (BAYER AG [DE]);
 [YD]US4374737  (LARSON DANA E [US], et al);
 [Y]US4631136  (JONES III REED W [US])
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.