US4828345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective light transmittable film having excellent anti-fogging and infrared ray reflective properties
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1987-07-09
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Granted: 1989-05-09
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Expires: 2007-07-09
Abstract
Abstract A selective light transmissible film or sheet having excellent anti-fogging properties, produced by forming a thin film of a metal and/or a metal compound having transparency and infrared ray reflective characteristics, on the surface of one side of a cellulose derivative film or sheet of which the surface of the other side is saponified with an alkaline aqueous solution, or on the surface of one side of a cellulose derivative film or sheet of which both surfaces are saponified with an alkaline aqueous solution.
Inventors
- 👤 Shuji Kitamura
- 👤 Kiyohiko Nakae
- 👤 Kozo Kotani
- 👤 Yoshihiro Nakatsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:39
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/208; G02B1/00; G02B1/10; G02B1/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31703
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A selective light transmissible film or sheet having excellent anti-fogging properties, produced by forming a thin film of a metal and/or a metal compound having transparency and infrared ray reflective characteristics, on the surface of one side of a cellulose derivative film or sheet of which the surface of the other side is saponified with an alkaline aqueous solution, or on the surface of one side of a cellulose derivative film or sheet of which both surfaces are saponified with an alkaline aqueous solution.
Claim 2
Dependent Claim
84 words
A selective light transmissible film or sheet having excellent anti-fogging properties, produced by forming a thin film of a metal and/or a metal compound having transparency and infrared ray reflective characteristics, on the surface of one side of a cellulose derivative film or sheet of which the surface of the other side is saponified with an alkaline aqueous solution, or on the surface of one side of a cellulose derivative film or sheet of which both surfaces are saponified with an alkaline aqueous solution.
Claim 3
Dependent Claim
62 words
A selective light transmissible film or sheet as claimed in claim 1, wherein an agglutinant or a wet-type adhesive is coated on the surface on which the thin film of a metal and/or a metal compound has been formed and the surface is protected by a release backing film, and the surface of the other side is protected by a protective film.
Claim 4
Dependent Claim
39 words
A film or sheet as claimed in claim 1 or 2 wherein the cellulose derivative is selected from the group consisting of cellulose diacetate, cellulose triacetate, cellulose acetatebutyrate, cellulose propionate and a mixture of two or more of them.
Claim 5
Dependent Claim
25 words
A film or sheet as claimed in claim 1 or 2 wherein the thickness of the cellulose derivative film is 0.01 mm to 2 mm.
Claim 6
Dependent Claim
37 words
A film or sheet as claimed in claim 1 or 2 wherein the metal is selected from the group consisting of Al, An, Sn, Ni, Cr, Au, Ag, Pt, Cu, Ti, In and alloys of the same.
Claim 7
Dependent Claim
51 words
A film or sheet as claimed in claim 1 or 2 wherein the metal compound is selected from the group consisting of TiO 2 , TiO, In 2 O 3 , SiO 2 , SiO, ZnS, CuO, CuO 2 Al 2 O 3 and mixtures of two or more of them.
Claim 8
Dependent Claim
27 words
A film or sheet as claimed in claim 1 or 2 wherein the thickness of the thin layer of the metal and/or metal compound is 50-1000 Å.
References Cited (Backward Citations)
US3867175A
Cited
JPS5521251A
Cited
JPS5587543A
Cited
JPS56126152A
Cited
US4413877A
Cited
JPS5759748A
Cited
JPS57144751A
Cited
JPS57174240A
Cited
US4703997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |