Patent US4247407A successfully refreshed from Google Patents.
US4247407A
Expired / Lapsed
US
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Magnetic recording composition
Assignee: Victor Company of Japan Ltd
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Filing: 1979-04-23
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Granted: 1981-01-27
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Expires: 1999-04-23
Abstract
Abstract A magnetic recording composition comprising, in solvent, a magnetic powder, a resinous binder and, as a lubricant, an ester of isostearyl alcohol and a monobasic fatty acid containing from 6 to 16 carbon atoms or cetyl isooctanoate contained in an amount of 0.5 to 20 wt % of the binder. The composition can further comprise triolein as another lubricant component in an amount of 0.5 to 10 wt % of the binder, the total amount of the ester and triolein being in the range of 1 to 20 wt % of the binder.
Inventors
- 👤 Tunehide Naruse
- 👤 Manabu Habu
- 👤 Makoto Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:14
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/71
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A magnetic recording composition comprising, in solvent, 15 to 90 wt% of a magnetic powder, correspondingly 35 to 10 wt% of a resinous binder, and a lubricant selected from the group consisting of an ester of isostearyl alcohol and a monobasic fatty acid having 6 to 16 carbon atoms and cetyl isooctanoate, the lubricant being contained in an amount of 0.5 to 20 wt% of the binder.
Claim 2
Dependent Claim
67 words
A magnetic recording composition comprising, in solvent, 15 to 90 wt% of a magnetic powder, correspondingly 35 to 10 wt% of a resinous binder, and a lubricant selected from the group consisting of an ester of isostearyl alcohol and a monobasic fatty acid having 6 to 16 carbon atoms and cetyl isooctanoate, the lubricant being contained in an amount of 0.5 to 20 wt% of the binder.
Claim 3
Dependent Claim
23 words
A magnetic recording composition according to claim 1, wherein the amount is in the range of 5 to 10 wt% of the binder.
Claim 4
Dependent Claim
14 words
A magnetic recording composition according to claim 1, wherein said lubricant is cetyl isooctanoate.
Claim 5
Dependent Claim
14 words
A magnetic recording composition according to claim 1, wherein said lubricant is isostearyl caprylate.
Claim 6
Dependent Claim
14 words
A magnetic recording composition according to claim 1, wherein said lubricant is isostearyl caproate.
Claim 7
Dependent Claim
14 words
A magnetic recording composition according to claim 1, wherein said lubricant is isostearyl laurate.
Claim 8
Dependent Claim
14 words
A magnetic recording composition according to claim 1, wherein said lubricant is isostearyl palmitate.
Claim 9
Dependent Claim
14 words
A magnetic recording composition according to claim 1, wherein said lubricant is isostearyl myristate.
Claim 10
Dependent Claim
28 words
A magnetic recording composition according to claim 1, wherein said lubricant is an ester of isostearyl alcohol and a monobasic fatty acid having 12 to 16 carbon atoms.
Claim 11
Dependent Claim
108 words
A magnetic recording composition comprising, in solvent, 15 to 90 wt% of a magnetic powder, correspondingly 35 to 10 wt% of a resinous binder, and a lubricant selected from the group consisting of an ester of isostearyl alcohol and a monobasic fatty acid having 6 to 16 carbon atoms and cetyl isooctanoate, the lubricant being contained in an amount of 0.5 to 20 wt% of the binder; said magnetic recording composition further comprising triolein as another lubricant component in an amount of 0.5 to 10 wt% of said binder, the total amount of the mixed lubricant being in the range of 1.0 to 20 wt% of said binder.
Claim 12
Dependent Claim
108 words
A magnetic recording composition comprising, in solvent, 15 to 90 wt% of a magnetic powder, correspondingly 35 to 10 wt% of a resinous binder, and a lubricant selected from the group consisting of an ester of isostearyl alcohol and a monobasic fatty acid having 6 to 16 carbon atoms and cetyl isooctanoate, the lubricant being contained in an amount of 0.5 to 20 wt% of the binder; said magnetic recording composition further comprising triolein as another lubricant component in an amount of 0.5 to 10 wt% of said binder, the total amount of the mixed lubricant being in the range of 1.0 to 20 wt% of said binder.
Claim 13
Dependent Claim
20 words
A magnetic recording composition according to claim 10, wherein the mixed lubricant is a mixture of cetyl isooctanoate and triolein.
Claim 14
Dependent Claim
20 words
A magnetic recording composition according to claim 10, wherein the mixed lubricant is a mixture of isostearyl caproate and triolein.
Claim 15
Dependent Claim
20 words
A magnetic recording composition according to claim 10, wherein the mixed lubricant is a mixture of isostearyl myristate and triolein.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |