US4199819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field determined cross-tie memory propagation circuit
Assignee: United States Department of the Navy
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Filing: 1978-11-08
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Granted: 1980-04-22
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Expires: 1998-11-08
Abstract
Abstract A symmetric narrow-wide electrical conductor for propagating binary information represented by Bloch line - crosstie pairs along a serriform crosstie thin magnetic film strip. Another conductor is made with alternate segments disposed upon opposite surfaces of the crosstie strip.
Inventors
- 👤 Leonard J. Schwee
- 👤 Wallace E. Anderson
- 👤 Yuan-Jye Liu
- 👤 Ronald N. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:21
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0841
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A serially accessible crosstie memory comprising: a thin-film strip of magnetic material of uniform thickness exhibiting a continuous, stationary domain wall spaced between opposite oblong serriform margins; each of the serriform margins formed by adjacent unidirectionally oriented denticles of equal serration length; an electrical conductor of a substance characterized by a lower resistivity than the magnetic material, deposited on one surface of the thin-film strip and spaced between opposite serriform margins; the electrical conductor having alternate serration lengths of greater width than adjoining intermediate serration lengths.
Claim 2
Dependent Claim
86 words
A serially accessible crosstie memory comprising: a thin-film strip of magnetic material of uniform thickness exhibiting a continuous, stationary domain wall spaced between opposite oblong serriform margins; each of the serriform margins formed by adjacent unidirectionally oriented denticles of equal serration length; an electrical conductor of a substance characterized by a lower resistivity than the magnetic material, deposited on one surface of the thin-film strip and spaced between opposite serriform margins; the electrical conductor having alternate serration lengths of greater width than adjoining intermediate serration lengths.
Claim 3
Dependent Claim
83 words
A serially accessible crosstie memory, comprising: a thin-film strip of magnetic material of uniform thickness having unidirectionally oriented denticulation along opposed oblong margins parallel to and symmetric about an oblong centerline; an electrical conductor of a substance characterized by a lower resistivity than the magnetic material, deposited in discrete alternate segments of equal length on opposite surfaces of the thin-film strip, alternate segments overlaid upon overlapping volumes of the thin-film strip, the segments being spaced apart and symmetrically disposed along the oblong centerline.
Claim 4
Dependent Claim
83 words
A serially accessible crosstie memory, comprising: a thin-film strip of magnetic material of uniform thickness having unidirectionally oriented denticulation along opposed oblong margins parallel to and symmetric about an oblong centerline; an electrical conductor of a substance characterized by a lower resistivity than the magnetic material, deposited in discrete alternate segments of equal length on opposite surfaces of the thin-film strip, alternate segments overlaid upon overlapping volumes of the thin-film strip, the segments being spaced apart and symmetrically disposed along the oblong centerline.
References Cited (Backward Citations)
US4128894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |