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Extract from the Register of European Patents

EP About this file: EP0319794

EP0319794 - Polysilazanes, their preparation, and preparation of silicon nitride-containing ceramic articles. [Right-click to bookmark this link]
Former [1989/24]Polysilazanes, their preparation, silicon nitride-containing ceramic articles and their preparation
[1993/35]
StatusNo opposition filed within time limit
Status updated on  02.07.1994
Database last updated on 11.09.2024
Most recent event   Tooltip02.07.1994No opposition filed within time limitpublished on 24.08.1994 [1994/34]
Applicant(s)For all designated states
HOECHST AKTIENGESELLSCHAFT
65926 Frankfurt am Main / DE
[N/P]
Former [1989/24]For all designated states
HOECHST AKTIENGESELLSCHAFT
D-65926 Frankfurt am Main / DE
Inventor(s)01 / Vaahs, Tilo, Dr.
Am Flachsland 54
D-6233 Kelkheim (Taunus) / DE
02 / Kleiner, Hans-Jerg, Dr.
Altkönigstrasse 11a
D-6242 Kronberg/Taunus / DE
03 / Peuckert, Marcellus, Dr.
Platanenweg 8
D-6238 Hofheim am Taunus / DE
04 / Brück, Martin
Haneckstrassse 17
D-6238 Hofheim am Taunus / DE
[1989/24]
Application number, filing date88119656.225.11.1988
[1989/24]
Priority number, dateDE1987374105904.12.1987         Original published format: DE 3741059
[1989/24]
Filing languageDE
Procedural languageDE
PublicationType: A2 Application without search report 
No.:EP0319794
Date:14.06.1989
Language:DE
[1989/24]
Type: A3 Search report 
No.:EP0319794
Date:05.07.1989
Language:DE
[1989/27]
Type: B1 Patent specification 
No.:EP0319794
Date:01.09.1993
Language:DE
[1993/35]
Search report(s)(Supplementary) European search report - dispatched on:EP18.05.1989
ClassificationIPC:C08G77/62, C04B35/00
[1989/24]
CPC:
C08G77/62 (EP,US); C08G77/42 (KR); C04B35/589 (EP,US)
Designated contracting statesBE,   CH,   DE,   FR,   GB,   IT,   LI,   NL [1989/24]
TitleGerman:Polysilazane, Verfahren zu ihrer Herstellung und Verfahren zur Herstellung von Siliziumnitrid enthaltenden keramischen Materiallen.[1993/35]
English:Polysilazanes, their preparation, and preparation of silicon nitride-containing ceramic articles.[1993/35]
French:Polysilazanes, procédé pour leur préparation,et procédé pour la préparation de matériaux céramiques fabriqués à partir de nitrure de silice.[1993/35]
Former [1989/24]Polysilazane, Verfahren zu ihrer Herstellung, aus ihnen herstellbare Siliziumnitrid enthaltende keramische Materialien, sowie deren Herstellung
Former [1989/24]Polysilazanes, their preparation, silicon nitride-containing ceramic articles and their preparation
Former [1989/24]Polysilazanes, procédé pour leur préparation, matériaux céramiques fabriqués à partir de nitrure de silice et leur fabrication
Examination procedure07.09.1989Examination requested  [1989/45]
16.07.1991Despatch of a communication from the examining division (Time limit: M04)
21.11.1991Reply to a communication from the examining division
18.03.1992Despatch of a communication from the examining division (Time limit: M02)
27.05.1992Reply to a communication from the examining division
13.10.1992Despatch of communication of intention to grant (Approval: Yes)
03.03.1993Communication of intention to grant the patent
03.06.1993Fee for grant paid
03.06.1993Fee for publishing/printing paid
Opposition(s)02.06.1994No opposition filed within time limit [1994/34]
Fees paidRenewal fee
12.10.1990Renewal fee patent year 03
21.12.1990Renewal fee patent year 04
16.10.1992Renewal fee patent year 05
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Documents cited:Search[A]US2579418  (CHERONIS NICHOLAS D);
 [AD]US4595775  (ARKLES BARRY C [US]);
 [A]US4404153  (GAUL JR JOHN H [US])
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.