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EP0036786

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EP About this file: EP0036786

EP0036786 - Zirconia ceramics and a method of producing the same [Right-click to bookmark this link]
Status	Patent maintained as amended Status updated on 24.03.1990 Database last updated on 29.03.2025
Most recent event Tooltip	15.08.2008	Change - opposition data/opponents data or that of the opponents representative	published on 17.09.2008 [2008/38]
Applicant(s)	For all designated states NGK INSULATORS, LTD. 2-56, Suda-cho, Mizuho-ku Nagoya-shi, Aichi 4678530 / JP
	[N/P]
Former [1981/39]	For all designated states NGK INSULATORS, LTD. 2-56, Suda-cho, Mizuho-ku Nagoya-shi, Aichi 467 / JP
Inventor(s)	01 / Otagiri, Tadashi 34, Takemi-Cho 1-chome Mizuho-Ku Nagoya City / JP
	02 / Watanabe, Tetsuo 50, Shinonokaze 2-chome Midori-Ku Nagoya City / JP
	03 / Mase, Syunzo 435, Aza-Motokinogo Ohaza-Tobishima-shinden Tobishima-Mura Ama-Gun Aichi Prefecture / JP
	[1981/39]
Representative(s)	Paget, Hugh Charles Edward, et al Mewburn Ellis LLP City Tower 40 Basinghall Street London EC2V 5DE / GB
	[N/P]
Former [1986/06]	Paget, Hugh Charles Edward, et al MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP / GB
Former [1981/39]	Whalley, Kevin MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS / GB
Application number, filing date	81301292.9	25.03.1981
	[1981/39]
Priority number, date	JP19800037522	26.03.1980 Original published format: JP 3752280
	JP19810020833	17.02.1981 Original published format: JP 2083381
	[1981/39]
Filing language	EN
Procedural language	EN
Publication	Type:	A1 Application with search report
	No.:	EP0036786
	Date:	30.09.1981
	Language:	EN
	[1981/39]
	Type:	B1 Patent specification
	No.:	EP0036786
	Date:	24.10.1984
	Language:	EN
	[1984/43]
	Type:	B2 New European patent specification
	No.:	EP0036786
	Date:	09.05.1990
	Language:	EN
	[1990/19]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	25.06.1981
Classification	IPC:	C04B35/48	[1981/39]
	CPC:	G01N27/4073 (EP,US); C04B35/486 (EP,US); F02F7/0087 (EP,US); H01M8/1253 (EP,US); F05C2203/0895 (EP,US); Y02E60/50 (EP,US); (+) Y02P70/50 (EP,US) (-)
Designated contracting states	DE, FR, GB [1981/39]
Title	German:	Zirkonoxid-Keramiken und Verfahren zu ihrer Herstellung	[1981/39]
	English:	Zirconia ceramics and a method of producing the same	[1981/39]
	French:	Céramiques en zircone et procédé pour leur préparation	[1981/39]
Examination procedure	11.01.1982	Examination requested [1982/26]
	16.02.1983	Despatch of a communication from the examining division (Time limit: M06)
	08.07.1983	Reply to a communication from the examining division
	09.01.1984	Despatch of communication of intention to grant (Approval: )
	09.04.1984	Communication of intention to grant the patent
	22.05.1984	Fee for grant paid
	22.05.1984	Fee for publishing/printing paid
Opposition(s)	Opponent(s)	01 18.07.1985 KYOCERA CORPORATION 5-22 Higashino Kita Inoue-cho Yamashina-ku, Kyoto-shi / JP Opponent's representative Woodcraft, David Charles Brookes Batchellor 102-108 Clerkenwell Road London EC1M 5SA / GB
		02 19.07.1985 30.07.1985 ADMISSIBLE Stora Feldmühle AG Patentabteilung Postfach 10 04 63 D-41704 Viersen / DE
		03 24.07.1985 14.08.1985 ADMISSIBLE PECHINEY, S.A. 23 rue Balzac F-75008 Paris / FR Opponent's representative Beetz & Partner mbB Patentanwälte Prinzregentenstraße 54 80538 München / DE
		[N/P]
	Former [2008/38]
	Opponent(s)	01 18.07.1985 KYOCERA CORPORATION 5-22 Higashino Kita Inoue-cho Yamashina-ku, Kyoto-shi / JP Opponent's representative Woodcraft, David Charles BROOKES & MARTIN High Holborn House 52/54 High Holborn London, WC1V 6SE / GB
		02 19.07.1985 30.07.1985 ADMISSIBLE Stora Feldmühle AG Patentabteilung Postfach 10 04 63 D-41704 Viersen / DE
		03 24.07.1985 14.08.1985 ADMISSIBLE PECHINEY, S.A. 23 rue Balzac F-75008 Paris / FR Opponent's representative Beetz & Partner Patentanwälte Steinsdorfstrasse 10 80538 München / DE
	Former [1985/40]
	Opponent(s)	01 18.07.1985 KYOCERA CORPORATION 5-22 Higashino Kita Inoue-cho Yamashina-ku, Kyoto-shi / JP Opponent's representative Woodcraft, David Charles BROOKES & MARTIN High Holborn House 52/54 High Holborn London, WC1V 6SE / GB
		02 19.07.1985 30.07.1985 ADMISSIBLE Stora Feldmühle AG Patentabteilung Postfach 10 04 63 D-41704 Viersen / DE
		03 24.07.1985 14.08.1985 ADMISSIBLE PECHINEY, S.A. 23 rue Balzac F-75008 Paris / FR Opponent's representative Patentanwälte Beetz - Timpe - Siegfried Schmitt-Fumian - Mayr Steinsdorfstrasse 10 D-80538 München / DE
	Former [1985/39]
	Opponent(s)	01 18.07.1985 KYOCERA CORPORATION 5-22 Higashino Kita Inoue-cho Yamashina-ku, Kyoto-shi / JP Opponent's representative Woodcraft, David Charles BROOKES & MARTIN High Holborn House 52/54 High Holborn London, WC1V 6SE / GB
	22.11.1985	Invitation to proprietor to file observations on the notice of opposition
	23.05.1986	Reply of patent proprietor to notice(s) of opposition
	08.07.1986	Communication of observations of patent proprietor (Time limit: M07)
	19.01.1987	Reply of parties involved to observations of patent proprietor
	03.02.1988	Despatch of communication that the patent will be revoked
	14.07.1989	Despatch of interlocutory decision in opposition
	24.07.1989	Legal effect of interlocutory decision in opposition
	06.12.1989	Despatch of communication that the patent will be maintained as amended
	24.02.1990	Fee for printing new specification paid
Appeal following opposition	12.04.1988	Appeal received No. T0155/88
	10.06.1988	Statement of grounds filed
	14.07.1989	Result of appeal procedure: maintenance in amended form
	14.07.1989	Date of oral proceedings
	17.07.1989	Minutes of the oral proceedings despatched
Fees paid	Renewal fee
	17.03.1983	Renewal fee patent year 03
	14.03.1984	Renewal fee patent year 04
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	[X]DE2231539 (MAGNESIUM ELEKTRON LTD);
		[X]US3432314 (MAZDIYASNI KHODABAKHSH S, et al);
		[A]DE1903597 (UNION CARBIDE CORP)
		[A] - AMERICAN CERAMIC BULLETIN, Vol. 58, No. 6, 1979 C.E. SCOTT et al. "Effect of Laundering and Milling on the Sintering Behavior of Stabilized ZrO2 Powders pages 587 to 590

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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