Patent US3840374A successfully refreshed from Google Patents.
US3840374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture film having a magnetic stripe
Assignee: Agfa Gevaert NV
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Filing: 1972-01-24
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Granted: 1974-10-08
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Expires: 1992-01-24
Abstract
Abstract The adherence of a magnetic sound stripe 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 stripe a metal complex which is soluble in such coating composition and complexes with the carboxyl groups of the polymeric binder or an organic compound which contains at least two reactive halogen atoms or aldehyde groups reactive with the polymer carboxyl groups.
Inventors
- 👤 Paesschen A Van
- 👤 J Herbots
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:14
CPC Classifications
G; G03; G03D; G03D15/00; G03C; G03C1/00; G03C1/76; G03C1/91; G11; G11B; G11B5/00; G11B5/62; G11B5/633; G11B5/68; G11B5/70; G11B5/702; G11B5/7021; G11B5/7022; G11B5/74
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 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 STRIPES OF A COATING COMPOSITION OF MAGNETIZABLE MATERIAL DISPERSED IN AN ALKALI-INSOLUBLE BINDER IN ADMIXTURE WITH AN ORGANIC COMPOUND CONTAINING AT LEAST TWO ALDEHYDE GROUPS REACTIVE WITH THE CARBOXYL GROUPS OF SAID POLYMERIC BINDER.
Claim 2
Dependent Claim
89 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 STRIPES OF A COATING COMPOSITION OF MAGNETIZABLE MATERIAL DISPERSED IN AN ALKALI-INSOLUBLE BINDER IN ADMIXTURE WITH AN ORGANIC COMPOUND CONTAINING AT LEAST TWO ALDEHYDE GROUPS REACTIVE WITH THE CARBOXYL GROUPS OF SAID 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.
Claim 4
Dependent Claim
90 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 stripes of a coating composition of magnetizable material dispersed in an alkali-insoluble binder in admixture with a metal complex which is soluble in said coating composition and complexes with the carboxyl groups of said binders.
Claim 5
Dependent Claim
90 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 stripes of a coating composition of magnetizable material dispersed in an alkali-insoluble binder in admixture with a metal complex which is soluble in said coating composition and complexes with the carboxyl groups of said binders.
Claim 6
Dependent Claim
42 words
Multilayer motion picture film material according to claim 3, 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)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |