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EP0551251
European procedure
Extract from the Register of European Patents
EP About this file: EP0551251
| EP0551251 - METHOD AND APPARATUS FOR CLEARING A REGION OF A Z-BUFFER [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 19.12.1996 Database last updated on 16.07.2024 | Most recent event Tooltip | 19.12.1996 | No opposition filed within time limit | published on 05.02.1997 [1997/06] | Applicant(s) | For all designated states SILICON GRAPHICS, INC. 2011 N. Shoreline Boulevard Mountain View, CA 94039-7311 / US | [1993/29] | Inventor(s) | 01 /
HANNAH, Marc, R. 474 O'Connor Street Menlo Park, CA 94025 / US | [1993/29] | Representative(s) | Wombwell, Francis, et al Forresters 15, Hamilton Square Birkenhead Merseyside CH41 6BR / GB | [N/P] |
| Former [1993/29] | Wombwell, Francis, et al Potts, Kerr & Co. 15, Hamilton Square Birkenhead Merseyside L41 6BR / GB | Application number, filing date | 89910803.9 | 12.09.1989 | [1993/29] | WO1989US03924 | Priority number, date | US19880243789 | 13.09.1988 Original published format: US 243789 | [1993/29] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | WO9002780 | Date: | 22.03.1990 | Language: | EN | [1990/07] | Type: | A1 Application with search report | No.: | EP0551251 | Date: | 21.07.1993 | Language: | EN | The application published by WIPO in one of the EPO official languages on 22.03.1990 takes the place of the publication of the European patent application. | [1993/29] | Type: | B1 Patent specification | No.: | EP0551251 | Date: | 07.02.1996 | [1996/06] | Search report(s) | International search report - published on: | US | 22.03.1990 | (Supplementary) European search report - dispatched on: | EP | 22.06.1993 | Classification | IPC: | G09G1/16, G06T1/00, G06T5/50 | [1996/06] | CPC: |
G06T15/405 (EP);
G09G5/393 (EP)
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| Former IPC [1993/29] | C09G1/02, G06F15/72 | Designated contracting states | DE, FR, GB [1993/30] |
| Former [1993/29] | AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE | Title | German: | VERFAHREN UND VORRICHTUNG ZUM AUSLÖSCHEN EINES GEBIETES EINES Z-PUFFERS | [1993/29] | English: | METHOD AND APPARATUS FOR CLEARING A REGION OF A Z-BUFFER | [1993/29] | French: | PROCEDE ET APPAREIL POUR EFFACER UNE REGION D'UN TAMPON Z | [1993/29] | Entry into regional phase | 10.04.1991 | National basic fee paid | 10.04.1991 | Search fee paid | 10.04.1991 | Designation fee(s) paid | 08.03.1991 | Examination fee paid | Examination procedure | 11.04.1990 | Request for preliminary examination filed International Preliminary Examining Authority: DE | 08.03.1991 | Examination requested [1993/29] | 09.09.1994 | Despatch of a communication from the examining division (Time limit: M06) | 15.03.1995 | Reply to a communication from the examining division | 12.05.1995 | Despatch of communication of intention to grant (Approval: Yes) | 08.08.1995 | Communication of intention to grant the patent | 10.11.1995 | Fee for grant paid | 10.11.1995 | Fee for publishing/printing paid | Opposition(s) | 08.11.1996 | No opposition filed within time limit [1997/06] | Fees paid | Renewal fee | 17.08.1991 | Renewal fee patent year 03 | 15.08.1992 | Renewal fee patent year 04 | 19.08.1993 | Renewal fee patent year 05 | 13.09.1994 | Renewal fee patent year 06 | 18.08.1995 | Renewal fee patent year 07 |
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| 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 | [A]GB2176676 ; | [A]EP0192958 | International search | [Y]US4609917 ; | [Y]US4016544 ; | [Y]US4725987 ; | [A]US4701863 ; | [A]US4689677 |