Patent US5991077A successfully refreshed from Google Patents.
US5991077A
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US
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Multilayer polarizer having a continuous and disperse phase
Assignee: 3M Innovative Properties Co
•
Filing: 1998-08-21
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Granted: 1999-11-23
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Expires: 2018-08-21
Abstract
Abstract An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
Inventors
- 👤 Lockwood W. Carlson
- 👤 Arthur L. Kotz
- 👤 Timothy J. Nevitt
- 👤 Andrew J. Ouderkirk
- 👤 Carl A. Stover
- 👤 Michael F. Weber
- 👤 Richard C. Allen
- 👤 Biswaroop Majumdar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:33
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3008; G02B5/3025; G02B5/3033; G02B5/3041; G02B5/305; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
53 words
A polarizer, comprising: a plurality of layers arranged in a repeating sequence of at least a first, second, and third layer type; wherein at least one of said first, second, and third layer type comprises a continuous phase and a disperse phase, and wherein said continuous and disperse phases comprise diverse thermoplastic polymers.
Claim 2
Dependent Claim
53 words
A polarizer, comprising: a plurality of layers arranged in a repeating sequence of at least a first, second, and third layer type; wherein at least one of said first, second, and third layer type comprises a continuous phase and a disperse phase, and wherein said continuous and disperse phases comprise diverse thermoplastic polymers.
Claim 3
Dependent Claim
46 words
The polarizer of claim 1, wherein said continuous and disperse phases have indices of refraction which differ by less than about 0.05 for visible light polarized along a first axis, and which differ by more than about 0.05 for visible light polarized along a second axis.
Claim 4
Dependent Claim
20 words
The polarizer of claim 1, wherein said polarizer has a total diffuse reflectivity of at least 30% for visible light.
Claim 5
Dependent Claim
30 words
The polarizer of claim 1, wherein said disperse phase is present in an amount within the range of about 15% to about 30% by volume relative to said continuous phase.
Claim 6
Dependent Claim
89 words
A polarizing film, comprising: a first layer comprising a polymeric continuous phase and a disperse phase disposed within said continuous phase; and a second layer, contiguous to said first layer; wherein said first and second layers have indices of refraction which differ by less than about 0.05 for visible light polarized along a first axis and which differ by more than about 0.05 for visible light polarized along a second axis orthogonal to said first axis; and wherein said first axis is perpendicular to the plane of said film.
Claim 7
Dependent Claim
89 words
A polarizing film, comprising: a first layer comprising a polymeric continuous phase and a disperse phase disposed within said continuous phase; and a second layer, contiguous to said first layer; wherein said first and second layers have indices of refraction which differ by less than about 0.05 for visible light polarized along a first axis and which differ by more than about 0.05 for visible light polarized along a second axis orthogonal to said first axis; and wherein said first axis is perpendicular to the plane of said film.
Claim 8
Dependent Claim
46 words
The polarizer of claim 5, wherein said continuous and disperse phases have indices of refraction which differ by less than about 0.05 for visible light polarized along a first axis, and which differ by more than about 0.05 for visible light polarized along a second axis.
Claim 9
Dependent Claim
20 words
The polarizer of claim 5, wherein said polarizer has a total diffuse reflectivity of at least 30% for visible light.
Claim 10
Dependent Claim
30 words
The polarizer of claim 5, wherein said disperse phase is present in an amount within the range of about 15% to about 30% by volume relative to said continuous phase.
Claim 11
Dependent Claim
71 words
A polarizer, comprising: a core layer comprising a continuous phase and a disperse phase; a first layer, disposed on a first side of said core layer; and a second layer, disposed on a second side of said core layer; wherein said continuous and disperse phases comprise first and second diverse polymeric materials, respectively, and wherein said first and second layers comprise at least one of said first and second polymeric materials.
Claim 12
Dependent Claim
71 words
A polarizer, comprising: a core layer comprising a continuous phase and a disperse phase; a first layer, disposed on a first side of said core layer; and a second layer, disposed on a second side of said core layer; wherein said continuous and disperse phases comprise first and second diverse polymeric materials, respectively, and wherein said first and second layers comprise at least one of said first and second polymeric materials.
Claim 13
Dependent Claim
18 words
The polarizer of claim 9, wherein each of said first and second layers comprise said first polymeric material.
Claim 14
Dependent Claim
14 words
The polarizer of claim 10, wherein said continuous phase comprises a naphthalene dicarboxylic acid.
Claim 15
Dependent Claim
12 words
The polarizer of claim 10, wherein said disperse phase comprises syndiotactic polystyrene.
Claim 16
Dependent Claim
13 words
The polarizer of claim 11, wherein said naphthalene dicarboxylic acid is polyethylene naphthalate.
Claim 17
Dependent Claim
46 words
The polarizer of claim 9, wherein said continuous and disperse phases have indices of refraction which differ by less than about 0.05 for visible light polarized along a first axis, and which differ by more than about 0.05 for visible light polarized along a second axis.
Claim 18
Dependent Claim
20 words
The polarizer of claim 9, wherein said polarizer has a total diffuse reflectivity of at least 30% for visible light.
Claim 19
Dependent Claim
30 words
The polarizer of claim 9, wherein said disperse phase is present in an amount within the range of about 15% to about 30% by volume relative to said continuous phase.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-11-22 | 2003-05-24 | 2003-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-22 | 2007-05-24 | 2007-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-22 | 2011-05-24 | 2011-11-23 | $7700.00 | Window Closed / Lapsed |