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EP0271893

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Extract from the Register of European Patents

EP About this file: EP0271893

EP0271893 - Azo compounds containing cyanogen groups, process for their preparation and their use as dyestuffs [Right-click to bookmark this link]
Status	No opposition filed within time limit Status updated on 02.04.1992 Database last updated on 01.04.2026
Most recent event Tooltip	02.04.1992	No opposition filed within time limit	published on 20.05.1992 [1992/21]
Applicant(s)	For all designated states HOECHST AKTIENGESELLSCHAFT 65926 Frankfurt am Main / DE
	[N/P]
Former [1988/25]	For all designated states HOECHST AKTIENGESELLSCHAFT D-65926 Frankfurt am Main / DE
Inventor(s)	01 / Mischke, Peter, Dr. Eichhornweg 2 D-6232 Bad Soden am Taunus / DE
	02 / Schladetsch, Hans Jakob, Dr. Völklingerweg 40 D-6000 Frankfurt am Main 71 / DE
	[1988/25]
Application number, filing date	87118642.5	16.12.1987
	[1988/25]
Priority number, date	DE19863643386	19.12.1986 Original published format: DE 3643386
	[1988/25]
Filing language	DE
Procedural language	DE
Publication	Type:	A2 Application without search report
	No.:	EP0271893
	Date:	22.06.1988
	Language:	DE
	[1988/25]
	Type:	A3 Search report
	No.:	EP0271893
	Date:	17.08.1988
	Language:	DE
	[1988/33]
	Type:	B1 Patent specification
	No.:	EP0271893
	Date:	29.05.1991
	Language:	DE
	[1991/22]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	28.06.1988
Classification	IPC:	C09B62/51, D06P1/384	[1988/25]
	CPC:	C09B62/51 (EP,KR,US); D06P1/38 (KR); D06P1/384 (EP,US); Y10S8/922 (US)
Designated contracting states	BE, CH, DE, ES, FR, GB, IT, LI [1988/25]
Title	German:	Cyangruppenhaltige Azoverbindungen, Verfahren zu deren Herstellung und ihre Verwendung als Farbstoffe	[1988/25]
	English:	Azo compounds containing cyanogen groups, process for their preparation and their use as dyestuffs	[1988/25]
	French:	Composés azoiques contenant des groupes cyano, leur procédé de préparation et leur utilisation comme colorants	[1988/25]
Examination procedure	04.11.1988	Examination requested [1988/52]
	04.04.1990	Despatch of a communication from the examining division (Time limit: M04)
	25.07.1990	Reply to a communication from the examining division
	16.10.1990	Despatch of communication of intention to grant (Approval: Yes)
	28.11.1990	Communication of intention to grant the patent
	20.02.1991	Fee for grant paid
	20.02.1991	Fee for publishing/printing paid
Opposition(s)	03.03.1992	No opposition filed within time limit [1992/21]
Fees paid	Renewal fee
	11.11.1989	Renewal fee patent year 03
	12.11.1990	Renewal fee patent year 04
	21.12.1990	Renewal fee patent year 05
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