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EP0002390
European procedure
Extract from the Register of European Patents
EP About this file: EP0002390
| EP0002390 - Method for cryptographic file security in multiple domain data processing systems [Right-click to bookmark this link] | |||
| Former [1981/50] | Method and apparatus for cryptographic file security in multiple domain data processing systems | ||
| [1981/50] | Status | No opposition filed within time limit Status updated on 14.09.2016 Database last updated on 06.07.2024 | Most recent event Tooltip | 14.09.2016 | No opposition filed within time limit | Applicant(s) | For all designated states International Business Machines Corporation New Orchard Road Armonk, NY 10504 / US | [N/P] | Inventor(s) | 01 /
Ehrsam, William Friedrich 3 Park Street R.D.5 Kingston New York 12401 / US | 02 /
Elander, Robert Carl 3210 Church Road Saugerties New York 12477 / US | 03 /
Matyas, Stephen Michael RD5 Box 19F Kingston New York 12401 / US | 04 /
Meyer, Carl Heinz-Wilhelm Rt. 38 RD2,Box 223-11 Kingston New York 12401 / US | 05 /
Sahulka, Richard John 30 Bluestone Road Woodstock New York 12498 / US | 06 /
Tuchman, Walter Leonard 27 Whitney Drive Woodstock New York 12498 / US | [N/P] | Representative(s) | Richards, John Peter IBM United Kingdom Limited Intellectual Property Department Hursley Park Winchester Hampshire SO21 2JN / GB | [N/P] |
| Former [1981/50] | Richards, John Peter IBM United Kingdom Limited Intellectual Property Department Hursley Park Winchester Hampshire SO21 2JN / GB | Application number, filing date | 78300747.9 | 05.12.1978 | Priority number, date | US19770857535 | 05.12.1977 Original published format: US 857535 | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0002390 | Date: | 13.06.1979 | Language: | EN | [N/P] | Type: | B1 Patent specification | No.: | EP0002390 | Date: | 16.12.1981 | Language: | EN | [1981/50] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 03.04.1979 | Classification | IPC: | H04L9/02, G06F13/00 | [1981/50] | CPC: |
G06F21/6236 (EP,US);
G06F21/606 (EP,US);
G07F7/1016 (EP,US);
H04L9/0656 (EP,US);
G06F2221/2153 (EP,US)
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| Former IPC [1981/50] | G06F13/00, H04L9/02 | Designated contracting states | DE, FR, GB, IT | Title | German: | Methode zur Absicherung einer Datei mittels Geheimschrift in Mehrbereichsdatenverarbeitungssystemen | [1981/50] | English: | Method for cryptographic file security in multiple domain data processing systems | [1981/50] | French: | Méthode pour la sécurité cryptographique d'un fichier dans les systèmes de traitement de données à domaine multiple | [1981/50] |
| Former [1981/50] | Methode und Gerät zur Absicherung einer Datei mittels Geheimschrift in Mehrfachbereichsdatenverarbeitungssystemen | ||
| Former [1981/50] | Method and apparatus for cryptographic file security in multiple domain data processing systems | ||
| Former [1981/50] | Méthode et appareil pour la sécurité cryptographique d'un fichier dans des systèmes de traitement de données à domaine multiple | Examination procedure | 16.07.1979 | Examination requested | 28.02.1980 | Despatch of a communication from the examining division (Time limit: {0}) | 26.06.1980 | Despatch of a communication from the examining division (Time limit: M04) | 11.10.1980 | Reply to a communication from the examining division | 16.12.1980 | Despatch of communication of intention to grant (Approval: ) | 27.03.1981 | Communication of intention to grant the patent | 10.04.1981 | Fee for grant paid | 10.04.1981 | Fee for publishing/printing paid | Opposition(s) | 25.10.1982 | No opposition filed within time limit [ N /P ] | Fees paid | Renewal fee | 08.12.1980 | Renewal fee patent year 03 | 02.12.1981 | Renewal fee patent year 04 |
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| Former [1999/42] | IT | 16.12.1981 | Documents cited: | Search | [ ] - IBM TECHNICAL DISCLOSURE BULLETIN Vol. 20, no. 10, March 1978New York EHRSAM et al.: "Cryptographic Key Authentication in File System" pages 3986-3989. |