US3328768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage protection systems
Assignee: International Business Machines Corp
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Filing: 1964-04-06
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Granted: 1967-06-27
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Gene M Amdahl
- 👤 Richard J Carnevale
- 👤 Arthur F Collins
- 👤 Elliott R Marsh
- 👤 Anthony E Villante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:01
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F12/00; G06F12/14; G06F12/1458; G06F12/1466; G06F13/00; G06F13/10; G06F13/14; G06F13/20; G06F13/22; G06F13/24; G06F13/26; G06F3/00; G06F3/12; G06F3/1293; G06F3/1295; G06F9/00; G06F9/06; G06F9/22; G06F9/226; G06F9/26; G06F9/30; G06F9/30094
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
184 words
IN A DATA PROCESSING SYSTEM OF THE TYPE HAVING A MAIN STORAGE DEVICE COMPRISING A PLURALITY OF ADDRESSABLE LOCATIONS ARRANGED IN BLOCKS AND STORING INSTRUCTION AND DATA MANIFESTATIONS AND A CENTRAL PROCESSING UNIT COOPERATING WITH SAID MANIFESTATIONS FOR CARRYING OUT THE PROGRAMS INDICATED BY SAID INSTRUCTION MANIFESTATIONS, STORAGE PROTECTION APPARATUS COMPRISING, A STORAGE MEANS FOR EACH BLOCK OF LOCATIONS AND HAVING STORED THEREIN A SELECTED STORAGE KEY ASSIGNED TO A PARTICULAR PROGRAM, STORAGE MEANS FOR STORING INSTRUCTION KEYS ASSIGNED TO THE RESPECTIVE PROGRAMS INCLUDING A PARTICULAR INSTRUCTION KEY RENDERING ALL OF THE ADDRESSABLE LOCATION ACCESSIBLE TO THE RESPECTIVE PROGRAM, MEANS FOR INSERTING INTO THE LATTER STORAGE MEANS, THE ACTIVE INSTRUCTION KEY OF THE PROGRAM CURRENTLY BEING RUN BY THE CENTRAL PROCESSING UNIT, MEANS EFFECTIVE, EACH TIME SAID MAIN STORAGE DEVICE IS ADDRESSED, FOR COMPARING THE ACTIVE INSTRUCTION KEY WITH THE STORAGE KEY OF THE LOCATION ADDRESSED, AND MEANS CONTROLLED BY THE COMPARING MEANS FOR PREVENTING THE ALTERATION OF DATA IN THE ADDRESSED LOCATION WHEN THE ACTIVE INSTRUCTION KEY, OTHER THAN SAID PARTICULAR INSTRUCTION KEY, DOES NOT BEAR A PREDETERMINED RELATIONSHIP TO THE STORAGE KEY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |