US5451449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored iridescent film
Assignee: BASF Catalysts LLC
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Filing: 1994-05-11
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Granted: 1995-09-19
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Expires: 2014-05-11
Abstract
Abstract Disclosed is a transparent thermoplastic resinous film of at least 10 generally parallel layers in which the contiguous adjacent layers are of diverse transparent thermoplastic resinous material differing in refractive index by at least about 0.03, the film containing a sufficient quantity of a transparent dye which is soluble in the thermoplastic resinous material of the layers in which it is located to enhance or modify the apparent color of at least one of the reflection and transmission colors of the film.
Inventors
- 👤 Ramakrishna S. Shetty
- 👤 Scott A. Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:08
CPC Classifications
B; B44; B44F; B44F1/00; B44F1/08; B44F1/14; B32; B32B; B32B27/00; B32B7/00; B32B7/02; B32B7/023; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/30; B32B27/308; B32B27/36; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223; G02B5/26; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/418; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24942; Y10T428/2495; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A transparent thermoplastic resinous laminate film of at least 10 very thin layers of substantially uniform thickness of about 30 to 500 nm, said layers being generally parallel and one surface of each of two of said layers constituting the outermost surfaces of the laminate film, the contiguous adjacent layers being of different transparent thermoplastic resinous materials, the contiguous adjacent layers differing in refractive index by at least about 0.03, and the film containing a sufficient quantity of a stable transparent dye which is soluble in the thermoplastic resinous material of the layers in which it is located to enhance or modify the apparent color of at least one of the reflection and/or transmission colors of the film.
Claim 2
Dependent Claim
118 words
A transparent thermoplastic resinous laminate film of at least 10 very thin layers of substantially uniform thickness of about 30 to 500 nm, said layers being generally parallel and one surface of each of two of said layers constituting the outermost surfaces of the laminate film, the contiguous adjacent layers being of different transparent thermoplastic resinous materials, the contiguous adjacent layers differing in refractive index by at least about 0.03, and the film containing a sufficient quantity of a stable transparent dye which is soluble in the thermoplastic resinous material of the layers in which it is located to enhance or modify the apparent color of at least one of the reflection and/or transmission colors of the film.
Claim 3
Dependent Claim
52 words
The transparent thermoplastic laminate film of claim 1 wherein each of the outermost surfaces of laminate film have a skin laminated thereto, said skin being a layer of transparent thermoplastic resinous material of substantially uniform thickness and each skin being at least 5% of the total thickness of the film and skins.
Claim 4
Dependent Claim
18 words
The transparent thermoplastic resinous laminate film of claim 2, wherein the skin comprises polyethylene terephthalate or polybutylene terephthalate.
Claim 5
Dependent Claim
14 words
The transparent thermoplastic resinous laminate film of claim 1 having at least 35 layers.
Claim 6
Dependent Claim
15 words
The transparent thermoplastic resinous laminate film of claim 4 having at least about 70 layers.
Claim 7
Dependent Claim
26 words
The transparent thermoplastic resinous laminate film of claim 5 wherein said adjacent resinous material has a refractive index which is lower by at least about 0.06.
Claim 8
Dependent Claim
19 words
The transparent thermoplastic resinous laminate film of claim 1 wherein one of the thermoplastic resinous materials is polyethylene terephthalate.
Claim 9
Dependent Claim
19 words
The transparent thermoplastic resinous laminate film of claim 7 wherein one of the thermoplastic resinous materials is polymethyl methacrylate.
Claim 10
Dependent Claim
17 words
The transparent thermoplastic resinous laminate film of claim 7 having at least 70 substantially uniformly thick layers.
Claim 11
Dependent Claim
23 words
The transparent thermoplastic resinous laminate film of claim 1 in which the dye is present in each of the different thermoplastic resinous materials.
Claim 12
Dependent Claim
26 words
The transparent thermoplastic resinous laminate film of claim 1 in which the dye is present in less than all of the different transparent thermoplastic resinous materials.
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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) | 1998-09-18 | 1999-03-20 | 1999-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-18 | 2003-03-20 | 2003-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-18 | 2007-03-20 | 2007-09-19 | $7700.00 | Window Closed / Lapsed |