US4188301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording composition
Assignee: Victor Company of Japan Ltd
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Filing: 1979-03-19
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Granted: 1980-02-12
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Expires: 1999-03-19
Abstract
Abstract A magnetic recording composition which comprises a magnetic powder, a resinous binder, and triolein or a mixture of triolein and hexyl laurate as a lubricant. When used singly, triolein is used in an amount of 0.5 to 10 wt % of the binder. When used in combination, on the other hand, the total amount is in the range of up to 20 wt % of the binder while using the triolein in the range of 0.5 to 15 wt. % of the binder.
Inventors
- 👤 Tunehide Naruse
- 👤 Yasushi Sasaki
- 👤 Yukio Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/71
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
A magnetic recording composition comprising 65 to 90 wt % of a magnetic powder, corresponding by 35 to 10 wt % of a resinous binder, and triolein as a lubricant contained in an amount of 0.5 to 10 wt % of the binder.
Claim 2
Dependent Claim
43 words
A magnetic recording composition comprising 65 to 90 wt % of a magnetic powder, corresponding by 35 to 10 wt % of a resinous binder, and triolein as a lubricant contained in an amount of 0.5 to 10 wt % of the binder.
Claim 3
Dependent Claim
19 words
A magnetic recording composition according to claim 1, wherein the lubricant is a mixture of triolein and hexyl laurate.
Claim 4
Dependent Claim
45 words
A magnetic recording composition according to claim 2, wherein the mixture is used, as a total, in an amount of up to 20 wt % of the binder and the triolein is used in an amount of 0.5 to 15 wt % of the binder.
Claim 5
Dependent Claim
33 words
A magnetic recording composition according to claim 1, wherein said resinous binder is composed of vinyl chloride-vinyl acetate copolymer and a member selected from a polyisocyanate, nitrile rubber and thermoplastic saturated polyester resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |