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US4582784A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic light-sensitive element with backing layer

Assignee: Fujifilm Holdings Corp
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Filing: 1984-10-18
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Granted: 1986-04-15
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Expires: 2004-10-18
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Abstract

Abstract A photographic light-sensitive material comprising at least one light-sensitive photographic emulsion layer on a support and a back layer provided on the reverse side of the support, wherein the uppermost surface layer of the back layer comprises a hydrophobic polymer binder and a hydrophilic polymer binder.

Inventors

  • 👤 Masafumi Fukugawa
  • 👤 Shinzi Kataoka
  • 👤 Yukio Shinagawa
  • 👤 Itsuo Fujiwara

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 19:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/7614

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 163 words
A photographic light-sensitive element comprising at least one light-sensitive photographic emulsion layer on a support and a back layer provided on the reverse side of the support, wherein a layer comprising a hydrophilic polymer is present between the uppermost surface layer of said back layer and the support, wherein the uppermost surface layer of said back layer comprises a hydrophobic polymer and 5 to 80% by weight of a hydrophilic polymer based on the weight of the total polymers which are employed in a total amount of 0.01 to 2 g per m 2 , wherein said hydrophobic polymer is selected from the group consisting of cellulose diacetate, cellulose triacetate, cellulose acetate butyrate and cellulose propionate and wherein said hydrophilic polymer is selected from the group consisting of copolymers and homopolymers of alkyl acrylates, alkyl methacrylates, acrylic acid, methacrylic acid, sulfoalkyl acrylates, sulfoalkyl methacrylates, glycidyl acrylate, glycidyl methacrylate, hydroxyalkyl acrylates, hydroxyalkyl methacrylates, alkoxyalkyl acrylates, alkoxyalkyl methacrylates, styrene, butadiene, maleic anhydride and itaconic anhydride.
Claim 2
Dependent Claim 163 words
A photographic light-sensitive element comprising at least one light-sensitive photographic emulsion layer on a support and a back layer provided on the reverse side of the support, wherein a layer comprising a hydrophilic polymer is present between the uppermost surface layer of said back layer and the support, wherein the uppermost surface layer of said back layer comprises a hydrophobic polymer and 5 to 80% by weight of a hydrophilic polymer based on the weight of the total polymers which are employed in a total amount of 0.01 to 2 g per m 2 , wherein said hydrophobic polymer is selected from the group consisting of cellulose diacetate, cellulose triacetate, cellulose acetate butyrate and cellulose propionate and wherein said hydrophilic polymer is selected from the group consisting of copolymers and homopolymers of alkyl acrylates, alkyl methacrylates, acrylic acid, methacrylic acid, sulfoalkyl acrylates, sulfoalkyl methacrylates, glycidyl acrylate, glycidyl methacrylate, hydroxyalkyl acrylates, hydroxyalkyl methacrylates, alkoxyalkyl acrylates, alkoxyalkyl methacrylates, styrene, butadiene, maleic anhydride and itaconic anhydride.
Claim 3
Dependent Claim 25 words
The photographic light-sensitive element as claimed in claim 1, wherein said hydrophobic polymer is selected from the group consisting of cellulose diacetate and cellulose triacetate.
Claim 4
Dependent Claim 32 words
The photographic light-sensitive element as claimed in claim 1, wherein the uppermost surface of said back layer comprises 10 to 40% by weight of the hydrophilic polymer based on the total polymers.
Claim 5
Dependent Claim 27 words
The photographic light-sensitive element as claimed in claim 1, wherein said polymers are employed in a total amount of 0.05 to 1 g per m 2 .
Claim 6
Dependent Claim 31 words
The photographic light-sensitive element as claimed in claim 1, wherein the layer present between the uppermost surface layer of said back layer and the support additionally contains an ionene type polymer.

References Cited (Backward Citations)

US3514291A Cited
US3525621A Cited
US4374924A Cited
US4248363A Cited
US4358533A Cited
US4388402A Cited
US4409322A Cited
US4447525A Cited
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US4480026A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-04-14 1989-10-14 1990-04-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-04-14 1993-10-14 1994-04-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-04-14 1997-10-14 1998-04-15 $7700.00 Window Closed / Lapsed

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