US5264292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer film having magnetic layers
Assignee: Emtec Magnetics GmbH
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Filing: 1991-09-04
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Granted: 1993-11-23
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Expires: 2011-09-04
Abstract
Abstract Transfer films consist essentially of a support film, a release layer and a transfer layer detachable from this release layer and composed of two magnetic layers and said transfer films may have, on the second magnetic layer, an adhesive layer which serves for fixing the transfer layer to a substrate, the two magnetic layers each containing a magnetizable material having a different coercive force.
Inventors
- 👤 Jenoe Kovacs
- 👤 Manfred Ohlinger
- 👤 Manfred Steuerwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/716; G11B5/73; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/914; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
163 words
A magnetic recording member having a plurality of layers including a support film, a release layer applied to said support film and a transferable magnetic layer applied to the release layer which is suitable for recording and reproducing data with read/write apparatus designed for magnetic recording media exhibiting either a high or a low coercivity according to ISO Standard 7811/2, said transferable magnetic layer being detachable from said release layer and consisting of two strata, the first stratum, which is adjacent to the release layer, having a residual induction of not less than 130 mT and containing a magnetic material having a specific particle surface of not less than 20 m 2 /g and a coercivity of 20 to 85 kA/m, and the second superposed stratum having a residual induction of not less than 130 mT and containing a magnetic material having a specific particle surface of not less than 20 m 2 /g and a coercivity of from 200 to 500 kA/m.
Claim 2
Dependent Claim
163 words
A magnetic recording member having a plurality of layers including a support film, a release layer applied to said support film and a transferable magnetic layer applied to the release layer which is suitable for recording and reproducing data with read/write apparatus designed for magnetic recording media exhibiting either a high or a low coercivity according to ISO Standard 7811/2, said transferable magnetic layer being detachable from said release layer and consisting of two strata, the first stratum, which is adjacent to the release layer, having a residual induction of not less than 130 mT and containing a magnetic material having a specific particle surface of not less than 20 m 2 /g and a coercivity of 20 to 85 kA/m, and the second superposed stratum having a residual induction of not less than 130 mT and containing a magnetic material having a specific particle surface of not less than 20 m 2 /g and a coercivity of from 200 to 500 kA/m.
Claim 3
Dependent Claim
52 words
A transfer film as defined in claim 1, wherein the magnetic stratum having a coercive force of from 20 to 85 kA/m has a thickness of from 5 to 12 μm and the second magnetic stratum contains a barium ferrite and/or strontium ferrite and has a thickness of more than 8 μm.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |