US4335183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording medium and method of fabricating it
Assignee: Toppan Infomedia Co Ltd
•
Filing: 1981-04-27
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Granted: 1982-06-15
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Expires: 2001-04-27
Abstract
Abstract A magnetic recording medium comprises a substrate of paper sheet and a magnetic recording layer applied to the substrate, which layer contains a magnetic material and an ultraviolet- or an electron beam-curing binder resin.
Inventors
- 👤 Hiroshi Hosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/04; D21H25/06; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7026; G11B5/73; G11B5/739; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
A magnetic recording medium comprising a substrate of paper sheet and a magnetic recording layer applied to said substrate, said layer containing a magnetic material and an ultraviolet-curing binder resin.
Claim 2
Dependent Claim
30 words
A magnetic recording medium comprising a substrate of paper sheet and a magnetic recording layer applied to said substrate, said layer containing a magnetic material and an ultraviolet-curing binder resin.
Claim 3
Dependent Claim
31 words
A magnetic recording medium as defined in claim 1 wherein said paper sheet has a rigidity of 2 to 100 g.cm, and said layer has a thickness of 0.5 to 20μ.
Claim 4
Dependent Claim
32 words
A magnetic recording medium comprising a substrate of paper sheet and a magnetic recording layer applied to said substrate, said layer containing a magnetic material and an electron beam curing binder resin.
Claim 5
Dependent Claim
32 words
A magnetic recording medium comprising a substrate of paper sheet and a magnetic recording layer applied to said substrate, said layer containing a magnetic material and an electron beam curing binder resin.
Claim 6
Dependent Claim
31 words
A magnetic recording medium as defined in claim 3 wherein said paper sheet has a rigidity of 2 to 100 g.cm and said layer has a thickness of 0.5 to 20μ.
Claim 7
Independent Claim
57 words
A method of fabricating a magnetic recording medium comprising the steps of preparing a substrate of paper sheet, applying to said substrate a magnetic paint containing a magnetic material and an ultraviolet-curing binder resin, and irradiating said applied paint film with ultraviolet rays to cause said paint film to cure and to thereby form a magnetic film.
Claim 8
Independent Claim
57 words
A method of fabricating a magnetic recording medium comprising the steps of preparing a substrate of paper sheet, applying to said substrate a magnetic paint containing a magnetic material and an ultraviolet-curing binder resin, and irradiating said applied paint film with ultraviolet rays to cause said paint film to cure and to thereby form a magnetic film.
Claim 9
Dependent Claim
29 words
A method as defined in claim 5 wherein said paper sheet has a rigidity of 2 to 100 g.cm and said layer has a thickness of 0.5 to 20μ.
Claim 10
Independent Claim
58 words
A method of fabricating a magnetic recording medium comprising the steps of preparing a substrate of paper sheet, applying to said substrate a magnetic paint containing a magnetic material and an electron beam-curing binder resin, and irradiating said applied paint film with electron beam to cause said paint film to cure and to thereby form a magnetic film.
Claim 11
Independent Claim
58 words
A method of fabricating a magnetic recording medium comprising the steps of preparing a substrate of paper sheet, applying to said substrate a magnetic paint containing a magnetic material and an electron beam-curing binder resin, and irradiating said applied paint film with electron beam to cause said paint film to cure and to thereby form a magnetic film.
Claim 12
Dependent Claim
29 words
A method as defined in claim 7 wherein said paper sheet has a rigidity of 2 to 100 g.cm and said layer has a thickness of 0.5 to 20μ.
References Cited (Backward Citations)
US3104983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |