Patent US3264615A successfully refreshed from Google Patents.
US3264615A
Expired / Lapsed
US
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Memory protection system
Assignee: International Business Machines Corp
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Filing: 1962-12-11
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Granted: 1966-08-02
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Expires: 1982-12-11
Abstract
No abstract record available.
Inventors
- 👤 Richard P Case
- 👤 Henry G Jones
- 👤 Ronald M Smith
- 👤 Veer John A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:28
CPC Classifications
G; G06; G06F; G06F12/00; G06F12/14; G06F12/1416; G06F12/1425; G06F12/1441; G06F7/00; G06F7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN COMBINATION WITH A MEMORY HAVNG A PLURALITY OF ADDRESSABLE STORAGE LOCATIONS WHICH ARE ASSIGNED ADDRESSES IN AN ORDERED SEQUENCE, SAID ADDRESS BEING EMPLOYED TO OBTAIN ACCESS TO SAID LOCATIONS, MEANS FOR PROTECTING PREDETERMINED LOCATIONS IN SAID MEMORY COMPRISING: (A) MEANS FOR STORING A CONFIGURATION OF ADDRESS IDENTIFYING INDICIA WHICH IS COMMON TO A PLURALITY OF ADDRESSES IN SAID MEMORY; (B) MEANS CONTROLLABLE FOR COMPARING AT LEAST A PART OF EACH ADDRESS EMPLOYED TO OBTAIN ACCESS TO A LOCATION IN SAID MEMORY WITH AT LEAST A PART OF THE CONFIGURATION STORED IN SAID REGISTER MEANS; (C) MEANS FOR SIGNALLING FAVOURABLE OR UNFAVORABLE COMPARASION; AND (D) MEANS RESPONSIVE TO A PREDETERMINED ONE OF SAID FAVORABLE OR UNFAVORABLE COMPARISON SIGNALS FOR SIGNALLING A VIOLATION OF A PROTECTED ADDRESSABLE LOCATION.
Claim 2
Dependent Claim
127 words
IN COMBINATION WITH A MEMORY HAVNG A PLURALITY OF ADDRESSABLE STORAGE LOCATIONS WHICH ARE ASSIGNED ADDRESSES IN AN ORDERED SEQUENCE, SAID ADDRESS BEING EMPLOYED TO OBTAIN ACCESS TO SAID LOCATIONS, MEANS FOR PROTECTING PREDETERMINED LOCATIONS IN SAID MEMORY COMPRISING: (A) MEANS FOR STORING A CONFIGURATION OF ADDRESS IDENTIFYING INDICIA WHICH IS COMMON TO A PLURALITY OF ADDRESSES IN SAID MEMORY; (B) MEANS CONTROLLABLE FOR COMPARING AT LEAST A PART OF EACH ADDRESS EMPLOYED TO OBTAIN ACCESS TO A LOCATION IN SAID MEMORY WITH AT LEAST A PART OF THE CONFIGURATION STORED IN SAID REGISTER MEANS; (C) MEANS FOR SIGNALLING FAVOURABLE OR UNFAVORABLE COMPARASION; AND (D) MEANS RESPONSIVE TO A PREDETERMINED ONE OF SAID FAVORABLE OR UNFAVORABLE COMPARISON SIGNALS FOR SIGNALLING A VIOLATION OF A PROTECTED ADDRESSABLE LOCATION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |