US3999992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive element with antihalation layer and magnetic recording strips containing in-benzene disulfofluoride to crosslink antihalation layer
Assignee: Agfa Gevaert NV
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Filing: 1974-02-21
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Granted: 1976-12-28
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Expires: 1994-02-21
Abstract
Abstract The adherence of a magnetic sound strip to the surface of an anti-halation layer of a multi-layer motion picture film including at least one light-sensitive emulsion layer is enhanced by using as the alkali-soluble binder of the anti-halation layer a polymer containing free carboxyl groups and including in the coating composition of the magnetic strip an organic compound which contains at least two reactive halogen atoms reactive with the polymer carboxyl groups.
Inventors
- 👤 August Jean Van Paesschen
- 👤 Joseph Antoine Herbots
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:47
CPC Classifications
G; G03; G03D; G03D15/00; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C1/91; G11; G11B; G11B5/00; G11B5/74; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31938; Y10T428/31971
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
Multilayer motion picture film material comprising a support, at least one light-sensitive emulsion layer and at the opposite side of said support an antihalation layer comprising an alkali-soluble polymeric binder containing free carboxyl groups and capable of being detached from said support in the presence of an alkaline medium, and deposited upon said antihalation layer strips of a coating composition of magnetizable material dispersed in an alkali-insoluble binder in admixture with an m-benzene disulphofluoride reactive with the carboxyl groups of said alkali-soluble polymeric binder.
Claim 2
Dependent Claim
84 words
Multilayer motion picture film material comprising a support, at least one light-sensitive emulsion layer and at the opposite side of said support an antihalation layer comprising an alkali-soluble polymeric binder containing free carboxyl groups and capable of being detached from said support in the presence of an alkaline medium, and deposited upon said antihalation layer strips of a coating composition of magnetizable material dispersed in an alkali-insoluble binder in admixture with an m-benzene disulphofluoride reactive with the carboxyl groups of said alkali-soluble polymeric binder.
Claim 3
Dependent Claim
42 words
Multilayer motion picture film material according to claim 1, wherein the alkali-soluble polymeric binder for said antihalation layer is cellulose acetate phthalate having a degree of acetyl substitution between 1.0 and 1.7 and a degree of phthalyl substitution between 0.6 and 1.2.
References Cited (Backward Citations)
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US3870525A
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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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |