US5147768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide color photographic material containing magnetic recording element
Assignee: Fujifilm Holdings Corp
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Filing: 1991-07-09
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Granted: 1992-09-15
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Expires: 2011-07-09
Abstract
Abstract A silver halide color photographic material comprising a transparent support having provided on the frontside thereof at least one hydrophilic colloid layer at least one layer of which is a photosensitive silver halide emulsion layer, said photographic material further comprising a transparent magnetic recording layer provided on the backside of the transparent support containing a ferromagnetic fine powder dispersed in a binder at a coverage of 4×10 -3 g/m 2 or more and having a gray degree of transmission density of 70% or more and an average transmission density of 0.5 or less in the visible region. The present invention provides a recording material for recording information both optically and magnetically without adversely affecting the color balance.
Inventors
- 👤 Yoshio Sakakibara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:24
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/22; G03C7/24; G03C11/00; G03C11/02; G11; G11B; G11B5/00; G11B5/62; G11B5/633
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
A silver halide color photographic material comprising a transparent support having provided on the frontside thereof at least one hydrophilic colloid layer at least one layer of which is a photosensitive silver halide emulsion layer, said photographic material further comprising a transparent magnetic recording layer provided on the backside of the transparent support, said magnetic layer containing a ferromagnetic fine powder containing Fe 2+ in a proportion of 5-50 wt % to Fe 3+ dispersed in a binder at a coverage of from 10 -2 to 1.8 g/m 2 based on the weight of the ferromagnetic fine powder and having a gray degree of transmission density of 70% or more and an average transmission density of 0.5 or less in the visible region.
Claim 2
Dependent Claim
123 words
A silver halide color photographic material comprising a transparent support having provided on the frontside thereof at least one hydrophilic colloid layer at least one layer of which is a photosensitive silver halide emulsion layer, said photographic material further comprising a transparent magnetic recording layer provided on the backside of the transparent support, said magnetic layer containing a ferromagnetic fine powder containing Fe 2+ in a proportion of 5-50 wt % to Fe 3+ dispersed in a binder at a coverage of from 10 -2 to 1.8 g/m 2 based on the weight of the ferromagnetic fine powder and having a gray degree of transmission density of 70% or more and an average transmission density of 0.5 or less in the visible region.
Claim 3
Dependent Claim
32 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is magnetic iron oxide containing Fe 2+ in a proportion of 5-50wt % to Fe 3+ .
Claim 4
Dependent Claim
35 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is cobalt modified magnetic iron oxide containing Fe 2+ in a proportion of 5-50 wt % to Fe 3+ .
Claim 5
Dependent Claim
18 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is chromium dioxide.
Claim 6
Dependent Claim
22 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is fine powder of a ferromagnetic metal.
Claim 7
Dependent Claim
33 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is magnetic iron oxide containing Fe 2+ in a proportion of 10-50 wt % to Fe 3+ .
Claim 8
Dependent Claim
33 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is magnetic iron oxide containing Fe 2+ in a proportion of 15-50 wt % to Fe 3+ .
Claim 9
Dependent Claim
35 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is cobalt modified magnetic iron oxide containing Fe 2+ in a proportion of 10-50 wt % to Fe 3+ .
Claim 10
Dependent Claim
35 words
A silver halide color photographic material as in claim 1, wherein the ferromagnetic fine powder is cobalt modified magnetic iron oxide containing Fe 2+ in a proportion of 15-50 wt % to Fe 3+ .
Claim 11
Dependent Claim
24 words
A silver halide color photographic material as in claim 1, wherein the magnetic recording layer has a thickness of from 0.1 to 10 microns.
Claim 12
Dependent Claim
22 words
A silver halide color photographic material as in claim 1, wherein said photographic material is in the form of a roll film.
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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |