Patent US4171399A successfully refreshed from Google Patents.
US4171399A
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Magnetic recording and storage device having high abrasion resistance and method
Assignee: Corning Glass Works
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Filing: 1977-12-08
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Granted: 1979-10-16
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Expires: 1997-12-08
Abstract
Abstract A magnetic recording and storage device having high wear resistance is produced by providing a magnetic recording and storage device having a film of solid magnetic material which has been bonded to a surface of a rigid substrate. A thin film of a lubricating compound is then applied to the film of magnetic material.
Inventors
- 👤 Richard E. Allen
- 👤 Peter R. Segatto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; G11B5/725; G11B5/64; G11B5/65; G11B5/658; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
65 words
A magnetic recording and storage device having high abrasion and wear resistance comprising a substrate, a solid magnetic film chemically bonded to a surface of said substrate, and a lubricating film disposed directly on the surface of said magnetic film, said lubricating film being material selected from the group consisting of a silicone based chlorosilane, polyethylene, polyoxyethylene monostearate, morpholino stearate, triethanolamine stearate, and mixtures thereof.
Claim 2
Dependent Claim
65 words
A magnetic recording and storage device having high abrasion and wear resistance comprising a substrate, a solid magnetic film chemically bonded to a surface of said substrate, and a lubricating film disposed directly on the surface of said magnetic film, said lubricating film being material selected from the group consisting of a silicone based chlorosilane, polyethylene, polyoxyethylene monostearate, morpholino stearate, triethanolamine stearate, and mixtures thereof.
Claim 3
Dependent Claim
88 words
The magnetic recording and storage device of claim 1 wherein said solid magnetic film is a material selected from the group consisting of magnetite, gamma ferric oxide, cobalt in combination with magnetite, cobalt in combination with gamma ferric oxide, nickel in combination with magnetite, nickel in combination with gamma ferric oxide, copper in combination with magnetite, copper in combination with gamma ferric oxide, zinc in combination with magnetite, zinc in combination with gamma ferric oxide, manganese in combination with magnetite, and manganese in combination with gamma ferric oxide.
Claim 4
Dependent Claim
21 words
The magnetic recording and storage device of claim 1 wherein said lubricating film has a thickness of less than 5000 A.
Claim 5
Dependent Claim
34 words
The magnetic recording and storage device of claim 1 wherein said lubricating film contains constituents selected from the group consisting of coloring agents, dispersion agents, emulsifying agents, stabilizers, bactericides, mold inhibitors and combinations thereof.
Claim 6
Dependent Claim
39 words
The magnetic recording and storage device of claim 1 wherein said magnetic film is a material selected from the group consisting of magnetite, gamma ferric oxide, cobalt in combination with magnetite, and cobalt in combination with gamma ferric oxide.
Claim 7
Dependent Claim
16 words
The magnetic recording and storage device of claim 1 wherein said lubricating film is polyoxyethylene monostearate.
Claim 8
Dependent Claim
21 words
The magnetic recording and storage device of claim 1 wherein said lubricant film is a mixture of polyethylene and polyoxyethylene monostearate.
Claim 9
Dependent Claim
23 words
The magnetic recording and storage device of claim 7 wherein said film of lubricating compound has a thickness of less than 5000 A.
Claim 10
Dependent Claim
43 words
The magnetic recording and storage device of claim 7 wherein said film of lubricating compound is a mixture of polyethylene and polyoxyethylene monostearate, said mixture consisting of between about 1 and 2.5 parts by weight of polyethylene for each part of polyoxyethylene monostearate.
Claim 11
Independent Claim
73 words
A method for producing an abrasion and wear resistant magnetic recording and storage device comprising the steps of providing a magnetic recording and storage device having a solid magnetic film chemically bonded to a substrate, and applying a lubricating film directly to the surface of said magnetic film, said lubricating film being material selected from the group consisting of a silicone based chlorosilane, polyethylene, polyoxyethylene monostearate, morpholino stearate, triethanolamine stearate, and mixtures thereof.
Claim 12
Independent Claim
73 words
A method for producing an abrasion and wear resistant magnetic recording and storage device comprising the steps of providing a magnetic recording and storage device having a solid magnetic film chemically bonded to a substrate, and applying a lubricating film directly to the surface of said magnetic film, said lubricating film being material selected from the group consisting of a silicone based chlorosilane, polyethylene, polyoxyethylene monostearate, morpholino stearate, triethanolamine stearate, and mixtures thereof.
Claim 13
Dependent Claim
86 words
The method of claim 10 wherein said solid magnetic film is a material selected from the group consisting of magnetite, gamma ferric oxide, cobalt in combination with magnetite, cobalt in combination with gamma ferric oxide, nickel in combination with magnetite, nickel in combination with gamma ferric oxide, copper in combination with magnetite, copper in combination with gamma ferric oxide, zinc in combination with magnetite, zinc in combination with gamma ferric oxide, manganese in combination with magnetite, manganese in combination with gamma ferric oxide, and combinations thereof.
Claim 14
Dependent Claim
42 words
The method of claim 10 further comprising the step of combining with said lubricating material a constituent selected from the group consisting of coloring agents, dispersion agents, emulsifying agents, stabilizers, bacetericides, mold inhibitors and combinations thereof prior to applying said lubricating film.
References Cited (Backward Citations)
US3466156A
Cited
US3795542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |