Patent US5142415A successfully refreshed from Google Patents.
US5142415A
Expired / Lapsed
US
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Back-lit display
Assignee: 3M Co
•
Filing: 1989-06-15
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Granted: 1992-08-25
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Expires: 2009-06-15
Abstract
Abstract A back-lit display having a window including a light-collimating film. The light-collimating film has an opaque material on a surface thereof. A material of a predetermined color is on the opaque material in registration therewith.
Inventors
- 👤 Gregory A. Koehnle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:18
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; G01; G01D; G01D11/00; G01D11/28; G12; G12B; G12B11/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
26 words
A back-lit display comprising: light-collimating film; opaque material on said light-collimating film; and material of a predetermined color on said opaque material and in registration therewith.
Claim 2
Dependent Claim
26 words
A back-lit display comprising: light-collimating film; opaque material on said light-collimating film; and material of a predetermined color on said opaque material and in registration therewith.
Claim 3
Dependent Claim
15 words
The back-lit display of claim 1 wherein said light-collimating film includes a louvered plastic film.
Claim 4
Dependent Claim
22 words
The back-lit display of claim 2 wherein said light-collimating film has two major surfaces, said major surfaces being parallel to each other.
Claim 5
Dependent Claim
21 words
The back-lit display of claim 3 wherein said louvered plastic film has a plurality of louvers perpendicular to said major surfaces.
Claim 6
Dependent Claim
22 words
The back-lit display of claim 3 wherein said louvered plastic film has a plurality of louvers not perpendicular to said major surfaces.
Claim 7
Dependent Claim
29 words
A window for a back-lit display comprising: light-collimating film; opaque material on said light-collimating film; and material of a predetermined color on said opaque material and in registration therewith.
Claim 8
Dependent Claim
29 words
A window for a back-lit display comprising: light-collimating film; opaque material on said light-collimating film; and material of a predetermined color on said opaque material and in registration therewith.
Claim 9
Dependent Claim
14 words
The window of claim 6 wherein said light-collimating film includes a louvered plastic film.
Claim 10
Dependent Claim
21 words
The window of claim 7 wherein said light-collimating film has two major surfaces, said major surfaces being parallel to each other.
Claim 11
Dependent Claim
20 words
The window of claim 8 wherein said louvered plastic film has a plurality of louvers perpendicular to said major surfaces.
Claim 12
Dependent Claim
21 words
The window of claim 8 wherein said louvered plastic film has a plurality of louvers not perpendicular to said major surfaces.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |