US3438006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Domain tip propagation logic
Assignee: Cambridge Memory Systems Inc
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Filing: 1966-01-12
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Granted: 1969-04-08
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Expires: 1986-01-12
Abstract
No abstract record available.
Inventors
- 👤 Robert J Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
A MAGNETIC LOGICAL ELEMENT COMPRISING, A MAGNETIC MEDIUM INITIALLY MAGNETIZED IN A FIRST DIRECTION, FIRST, SECOND AND THIRD CHANNELS LOCATED WITHIN SAID MAGNETIC MEDIUM, EACH OF SAID CHANNELS BEING DEFINED AS AN AREA EXHIBITING A SUBSTANTIALLY LOWER COERCIVE FORCE CHARACTERISTIC THAN SAID MEDIUM, EACH OF SAID CHANNELS INTERSECTING AT A COMMON POINT, MEANS FOR NUCLEATING WITHIN SAID FIRST CHANNEL A DOMAIN OF MAGNETIZATION REVERSED IN DIRECTION FROM THE DIRECTION OF SAID INITIAL MAGNETIZATION, AND MEANS FOR APPLYING A MAGNETIC FIELD TO SAID MAGNETIC MEDIUM, SAID MAGNETIC FIELD HAVING AT LEAST ONE COMPONENT OPPOSITE IN DIRECTION TO THE DIRECTION OF SAID INITIAL MAGNETIZATION, AND EXHIBITING SUFFICIENT INTENSITY TO PROPAGATE SAID REVERSED DOMAIN OF MAGNETIZATION INTO ONE OR THE OTHER OF SAID SECOND AND THIRD CHANNELS, THE SELECTION OF SAID SECOND OR THIRD CHANNELS BEING DETERMINED BY THE RESULTANT DIRECTION OF ALL OF THE COMPONENTS OF SAID APPLIED FIELD.
References Cited (Backward Citations)
US3176276A
Cited
US3172089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |