Deutsch English Français

Contact

EP0252244

European procedure

Quick help

Maintenance news

Scheduled maintenance

Regular maintenance outages:
between 05.00 and 05.15 hrs CET (Monday to Sunday).

Other outages
Availability

2022.02.11

More...

News flashes

Italy joins the Federated Register

Click here for more information on the Federated Register.

2025-06-12

More...

Extract from the Register of European Patents

EP About this file: EP0252244

EP0252244 - Process for preparing vinyldiphosphonic acid and its salts [Right-click to bookmark this link]
Status	The application has been withdrawn Status updated on 20.12.1989 Database last updated on 08.04.2026
Most recent event Tooltip	07.07.2007	Change - inventor	published on 08.08.2007 [2007/32]
Applicant(s)	For all designated states Benckiser-Knapsack GmbH Dr. Albert-Reimann-Strasse 2 D-6802 Ladenburg / DE
	[1988/02]
Inventor(s)	01 / Kleemann, Stephan, Dr. Mozartstrasse 25 D-6905 Schriesheim / DE
	02 / Ehret, Werner Richard-Wagner-Strasse 50 D-6901 Wilhelmsfeld / DE
	[1988/02]
Representative(s)	Grussdorf, Jürgen Patentanwälte Zellentin & Partner Rubensstrasse 30 67061 Ludwigshafen / DE
	[N/P]
Former [1988/02]	Grussdorf, Jürgen, Dr. Patentanwälte Zellentin & Partner Rubensstrasse 30 D-67061 Ludwigshafen / DE
Application number, filing date	87106850.8	12.05.1987
	[1988/02]
Priority number, date	DE19863622786	07.07.1986 Original published format: DE 3622786
	[1988/02]
Filing language	DE
Procedural language	DE
Publication	Type:	A1 Application with search report
	No.:	EP0252244
	Date:	13.01.1988
	Language:	DE
	[1988/02]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	26.10.1987
Classification	IPC:	C07F9/38	[1988/02]
	CPC:	C07F9/3847 (EP,US)
Designated contracting states	AT, BE, CH, DE, ES, FR, GB, GR, IT, LI, LU, NL, SE [1988/02]
Title	German:	Verfahren zur Herstellung von Vinyldiphosphonsäure und ihren Salzen	[1988/02]
	English:	Process for preparing vinyldiphosphonic acid and its salts	[1988/02]
	French:	Procédé de préparation d'acide vinyldiphosphonique et de ses sels	[1988/02]
File destroyed:	24.06.1996
Examination procedure	31.10.1987	Examination requested [1988/02]
	26.09.1988	Despatch of a communication from the examining division (Time limit: M04)
	29.10.1988	Reply to a communication from the examining division
	03.01.1989	Despatch of a communication from the examining division (Time limit: M02)
	16.02.1989	Reply to a communication from the examining division
	05.06.1989	Despatch of communication of intention to grant (Approval: Yes)
	31.07.1989	Communication of intention to grant the patent
	02.10.1989	Fee for grant paid
	02.10.1989	Fee for publishing/printing paid
	30.11.1989	Application withdrawn by applicant [1990/06]
Fees paid	Renewal fee
	16.03.1989	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.

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.