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EP0325979

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Extract from the Register of European Patents

EP About this file: EP0325979

EP0325979 - Process for producing 4,4'-dihydroxy diphenyl [Right-click to bookmark this link]
Status	No opposition filed within time limit Status updated on 08.10.1992 Database last updated on 30.03.2026
Most recent event Tooltip	08.10.1992	No opposition filed within time limit	published on 25.11.1992 [1992/48]
Applicant(s)	For all designated states BASF Aktiengesellschaft Carl-Bosch-Strasse 38 67063 Ludwigshafen / DE
	[N/P]
Former [1989/31]	For all designated states BASF Aktiengesellschaft Carl-Bosch-Strasse 38 D-67063 Ludwigshafen / DE
Inventor(s)	01 / Eichenauer, Ulrich, Dr. Paul-Ehrlich-Strasse 25 a D-6000 Frankfurt 70 / DE
	02 / Neumann, Peter, Dr. Poststrasse 28 D-6800 Mannheim 31 / DE
	[1989/31]
Application number, filing date	89100640.5	14.01.1989
	[1989/31]
Priority number, date	DE19883801943	23.01.1988 Original published format: DE 3801943
	[1989/31]
Filing language	DE
Procedural language	DE
Publication	Type:	A1 Application with search report
	No.:	EP0325979
	Date:	02.08.1989
	Language:	DE
	[1989/31]
	Type:	B1 Patent specification
	No.:	EP0325979
	Date:	04.12.1991
	Language:	DE
	[1991/49]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	18.05.1989
Classification	IPC:	C07C37/04, C07C39/15	[1989/31]
	CPC:	C07C37/04 (EP,US)
	C-Set:	C07C37/04, C07C39/15 (EP,US)
Designated contracting states	CH, DE, FR, GB, IT, LI [1989/31]
Title	German:	Verfahren zur Herstellung von 4,4'-Dihydroxybiphenyl	[1989/31]
	English:	Process for producing 4,4'-dihydroxy diphenyl	[1989/31]
	French:	Procédé de préparation de dihydroxy-4,4' biphényle	[1989/31]
Examination procedure	27.05.1989	Examination requested [1989/31]
	23.11.1990	Despatch of a communication from the examining division (Time limit: M04)
	07.03.1991	Reply to a communication from the examining division
	23.04.1991	Despatch of communication of intention to grant (Approval: Yes)
	23.05.1991	Communication of intention to grant the patent
	03.07.1991	Fee for grant paid
	03.07.1991	Fee for publishing/printing paid
Opposition(s)	05.09.1992	No opposition filed within time limit [1992/48]
Fees paid	Renewal fee
	02.01.1991	Renewal fee patent year 03
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