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EP0053741

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Extract from the Register of European Patents

EP About this file: EP0053741

EP0053741 - Purification of cellulose and starch ethers [Right-click to bookmark this link]
Status	Patent revoked Status updated on 01.11.1988 Database last updated on 03.10.2024
Most recent event Tooltip	25.07.2008	Change - representative	published on 27.08.2008 [2008/35]
Applicant(s)	For all designated states Wolff Walsrode Aktiengesellschaft Postfach 15 15 D-29655 Walsrode / DE
	For all designated states BAYER AG 51368 Leverkusen / DE
	[N/P]
Former [1982/24]	For all designated states Wolff Walsrode Aktiengesellschaft Postfach 15 15 D-29655 Walsrode / DE
	For all designated states BAYER AG D-51368 Leverkusen / DE
Inventor(s)	01 / Bernert, Claus-Rüdiger, Dr. Radewiesen 23 D-3030 Walsrode / DE
	02 / Hartwig, Volker Idinger Heide Nr. 5 D-3032 Fallingbostel / DE
	03 / Kords, Christian, Dipl.-Ing. Ahornring 29 D-3030 Walsrode / DE
	04 / Redeker, Detmar, Dr. Roggendorfstrasse 53 D-5000 Köln 80 / DE
	[1982/24]
Representative(s)	Zobel, Manfred, et al LANXESS Deutschland GmbH LIP IPR 51369 Leverkusen / DE
	[N/P]
Former [2008/35]	Zobel, Manfred, et al LANXESS Deutschland GmbH LIP IPR 51369 Leverkusen / DE
Former [1988/05]	Zobel, Manfred, Dr., et al BAYER AG Konzernverwaltung RP Patente Konzern D-51368 Leverkusen / DE
Former [1986/25]	Kutzenberger, Helga, Dr. c/o Bayer AG, K-RP LTK, Q 18 D-51368 Leverkusen, Bayerwerk / DE
Former [1982/24]	Kutzenberger, Helga, Dr. c/o Bayer AG Zentralbereich Patente Marken und Lizenzen D-5090 Leverkusen 1, Bayerwerk / DE
Application number, filing date	81109731.0	17.11.1981
	[1982/24]
Priority number, date	DE19803044696	27.11.1980 Original published format: DE 3044696
	[1982/24]
Filing language	DE
Procedural language	DE
Publication	Type:	A1 Application with search report
	No.:	EP0053741
	Date:	16.06.1982
	Language:	DE
	[1982/24]
	Type:	B1 Patent specification
	No.:	EP0053741
	Date:	19.09.1984
	Language:	DE
	[1984/38]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	05.04.1982
Classification	IPC:	C08B11/20, C08B31/08	[1982/24]
	CPC:	C08B11/20 (EP,US); C08B31/08 (EP,US)
Designated contracting states	DE, FR, IT, NL, SE [1982/24]
Title	German:	Reinigung von Cellulose- und Stärkeethern	[1982/24]
	English:	Purification of cellulose and starch ethers	[1982/24]
	French:	Purification d'éthers de la cellulose et de l'amidon	[1982/24]
Examination procedure	17.11.1981	Examination requested [1982/24]
	28.07.1983	Despatch of a communication from the examining division (Time limit: M04)
	10.11.1983	Reply to a communication from the examining division
	30.01.1984	Despatch of communication of intention to grant (Approval: )
	08.03.1984	Communication of intention to grant the patent
	14.04.1984	Fee for grant paid
	14.04.1984	Fee for publishing/printing paid
Opposition(s)	Opponent(s)	01 23.05.1985 13.06.1985 ADMISSIBLE Akzo Nobel N.V. Velperweg 76 NL-6824 BM Arnhem / NL Opponent's representative Gottschal, Auko Jan R. Sieders c.s. Postbus 314 NL-6800 AH Arnhem / NL
		02 14.06.1985 08.07.1985 ADMISSIBLE Hoechst Aktiengesellschaft Werk Kalle-Albert Zentrale Patentabteilung KA D-65174 Wiesbaden / DE
		03 15.06.1985 08.07.1985 ADMISSIBLE Henkel Kommanditgesellschaft auf Aktien TFP / Patentabteilung D-40191 Düsseldorf / DE
		[N/P]
	Former [1985/35]
	Opponent(s)	01 23.05.1985 13.06.1985 ADMISSIBLE Akzo N.V. Velperweg 76 NL-6824 BM Arnhem / NL Opponent's representative Gottschal, Auko Jan R. Sieders c.s. Postbus 314 NL-6800 AH Arnhem / NL
		02 14.06.1985 08.07.1985 ADMISSIBLE Hoechst Aktiengesellschaft Werk Kalle-Albert Zentrale Patentabteilung KA D-65174 Wiesbaden / DE
		03 15.06.1985 08.07.1985 ADMISSIBLE Henkel Kommanditgesellschaft auf Aktien TFP / Patentabteilung D-40191 Düsseldorf / DE
	Former [1985/31]
	Opponent(s)	01 23.05.1985 13.06.1985 ADMISSIBLE Akzo N.V. Velperweg 76 NL-6824 BM Arnhem / NL Opponent's representative Gottschal, Auko Jan R. Sieders c.s. Postbus 314 NL-6800 AH Arnhem / NL
	30.07.1985	Invitation to proprietor to file observations on the notice of opposition
	12.03.1986	Reply of patent proprietor to notice(s) of opposition
	19.03.1986	Communication of observations of patent proprietor (Time limit: M04)
	18.07.1986	Reply of parties involved to observations of patent proprietor
	22.01.1987	Despatch of a communication from the opposition division (Time limit: M04)
	25.05.1987	Reply to a communication from the opposition division
	12.04.1988	Date of oral proceedings
	04.05.1988	Despatch of minutes of oral proceedings
	22.07.1988	Despatch of communication that the patent will be revoked
	02.08.1988	Legal effect of revocation of patent [1988/51]
Fees paid	Renewal fee
	25.10.1983	Renewal fee patent year 03
Opt-out from the exclusive Tooltip competence of the Unified Patent Court	See the Register of the Unified Patent Court for opt-out data
	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	FR1298961 [ ] (KIRKLEES LTD);
		DE2038310 [ ] (HENKEL & CIE GMBH)
		[ ] - KIRK-OTHMER: "Encyclopedia of Chemical Technology", 3. Auflage, Teil 10: "Filtration", 1980, John Wiley & Sons, seiten 284-337 New York, U.S.A. * seite 320, abbildung 18 *

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.

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