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EP0534420
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EP About this file: EP0534420
| EP0534420 - A method for generating public and private key pairs using a passphrase [Right-click to bookmark this link] | Status | The application has been refused Status updated on 13.11.1998 Database last updated on 02.11.2024 | Most recent event Tooltip | 13.11.1998 | Refusal of application | published on 30.12.1998 [1998/53] | Applicant(s) | For all designated states International Business Machines Corporation New Orchard Road Armonk, NY 10504 / US | [N/P] |
| Former [1993/13] | For all designated states International Business Machines Corporation Old Orchard Road Armonk, N.Y. 10504 / US | Inventor(s) | 01 /
Matyas, Stephen M. 10 298 Cedar Ridge Drive Manassas, VA 22110 / US | 02 /
Johnson, Donald B. 11 635 Crystal Creek Lane Manassas, VA 22111 / US | 03 /
Le An V. 10 227 Battlefield Drive Manassas, VA 22110 / US | 04 /
Martin, William C. 1835 Hilliard Lane Concord, NC 28025 / US | 05 /
Prymak, Rostislaw 15 900 Fairway Drive Dumfries, VA 22026 / US | 06 /
Wilkins, John D. P.O. Box 8 Somerville, VA 22739 / US | [1993/13] | Representative(s) | Schäfer, Wolfgang IBM Deutschland Informationssysteme GmbH Patentwesen und Urheberrecht 70548 Stuttgart / DE | [N/P] |
| Former [1994/35] | Schäfer, Wolfgang, Dipl.-Ing. IBM Deutschland Informationssysteme GmbH Patentwesen und Urheberrecht D-70548 Stuttgart / DE | ||
| Former [1993/39] | Mönig, Anton, Dipl.-Ing. IBM Deutschland Informationssysteme GmbH, Patentwesen und Urheberrecht D-70548 Stuttgart / DE | ||
| Former [1993/19] | Herzog, Friedrich Joachim, Dipl.-Ing. Birkenstrasse 77 D-71155 Altdorf / DE | ||
| Former [1993/13] | Herzog, Friedrich Joachim, Dipl.-Ing. IBM Deutschland Informationssysteme GmbH Patentwesen und Urheberrecht Pascalstrasse 100 W-7000 Stuttgart 80 / DE | Application number, filing date | 92116309.3 | 11.09.1992 | [1993/13] | Priority number, date | US19910766533 | 27.09.1991 Original published format: US 766533 | [1993/13] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0534420 | Date: | 31.03.1993 | Language: | EN | [1993/13] | Type: | A3 Search report | No.: | EP0534420 | Date: | 08.06.1994 | Language: | EN | [1994/23] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 20.04.1994 | Classification | IPC: | H04L9/30, H04L9/08 | [1993/13] | CPC: |
G06F9/30003 (EP,US);
H04L9/088 (EP,US);
H04L9/302 (EP,US);
H04L2209/26 (EP,US)
| Designated contracting states | DE, FR, GB, IT, NL [1993/13] | Title | German: | Verfahren zur Erzeugung von öffentlichen und geheimen Schlüsselpaaren mittels eines Passwortes | [1993/13] | English: | A method for generating public and private key pairs using a passphrase | [1993/13] | French: | Procédé de génération de paires de clés publiques et secrêtes utilisant une location de passe | [1993/13] | Examination procedure | 16.07.1993 | Examination requested [1993/36] | 18.04.1997 | Despatch of a communication from the examining division (Time limit: M04) | 23.07.1997 | Reply to a communication from the examining division | 24.02.1998 | Despatch of communication of intention to grant (Approval: ) | 04.08.1998 | Despatch of communication that the application is refused, reason: formalities examination [1998/53] | 14.08.1998 | Application refused, date of legal effect [1998/53] | Fees paid | Renewal fee | 27.09.1994 | Renewal fee patent year 03 | 07.09.1995 | Renewal fee patent year 04 | 21.09.1996 | Renewal fee patent year 05 | 19.09.1997 | Renewal fee patent year 06 | Penalty fee | Additional fee for renewal fee | 30.09.1998 | 07 M06 Not yet paid |
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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]EP0292790 (IBM [US]) [A] 1,5-7,10,14-16 * column 3, line 42 - column 4, line 17 * * column 5, line 54 - column 6, line 8 *; | [DA]US4850017 (MATYAS JR STEPHEN M [US], et al) [DA] 1,5-7,10,14-16; | [A]EP0202768 (IBM [US]) [A] 1,5-8,10,14,15,17 * column 4, line 51 - column 5, line 8 *; | [DA]US4736423 (MATYAS STEPHEN MICHAEL [US]) [DA] 1,5-8,10,14,15,17 | [A] - C. BURTON, "RSA: A PUBLIC KEY CRYPTOGRAPHIC SYSTEM, PART II", DR. DOBBS JOURNAL, (198404), vol. 9, no. 4, pages 33 - 40 [A] 1,5-8,10,14,15,17 * page 34, column R, paragraph L * |