Patent US2457152A successfully refreshed from Google Patents.
Patent US3616404A successfully refreshed from Google Patents.
US3616404A
Expired / Lapsed
US
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Computer information storage device and method for making the same
Assignee: Precision Magnetics Inc
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Filing: 1969-09-24
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Granted: 1971-10-26
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Expires: 1989-09-24
Abstract
Abstract The apparatus aspect of the disclosure describes a computer information storage device comprising a wire, a magnetic material substantially surrounding the wire, and a coating located between the wire and the magnetic material for providing a smooth surface on which the magnetic material may be deposited. The coating also provides a barrier that prevents diffusion of the wire into the magnetic material.
Inventors
- 👤 Lawrence A Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A method, as claimed in claim 1, wherein the step of forming the wire into an array comprises the steps of: arranging the center lines of said segments 30 to 50 mils apart; and placing an equal amount of tension on each segment of the wire.
Claim 2
Dependent Claim
59 words
A method, as claimed in claim 1, wherein the step of cleaning the wire comprises the steps of: applying trichloroethylene (cl2CH- CH2cl) to the wire; applying acetone (CH3COCH3) or methanol (CH3OH) to the wire; applying a nitric acid (HNO3) solution to the wire; applying a sodium hydroxide (NaOH) solution to the wire; and rinsing the wire in distilled water.
Claim 3
Dependent Claim
14 words
A method, as claimed in claiM 1, wherein the coating substance comprises a silicate.
Claim 4
Dependent Claim
27 words
A method, as claimed in claim 1, wherein the coating substance comprises a material selected from the group consisting of potassium silicate (K2SiO3), and sodium silicate (Na2SiO3).
Claim 5
Dependent Claim
14 words
A method, as claimed in claim 1, wherein said predetermined temperature exceeds 400* C.
Claim 6
Dependent Claim
32 words
A method, as claimed in claim 1, wherein the sputter deposition is stopped when the thickness of the coating of magnetic material on the wire is between 1000 angstroms and 3000 angstroms.
Claim 7
Dependent Claim
65 words
A method, as claimed in claim 1, wherein the steps of arranging electrical conductors adjacent to the coated segments of said wire comprises the steps of: positioning the segments in contact with a circuit board; applying an adhesive to the segments and the circuit board simultaneously; placing the electrical conductors over the segments; and connecting the electrical conductors to predetermined sections of the circuit board.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |