Patent US4818624A successfully refreshed from Google Patents.
US4818624A
Expired / Lapsed
US
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Stabilized light-polarizing material
Assignee: 3M Innovative Properties Co
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Filing: 1986-12-19
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Granted: 1989-04-04
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Expires: 2006-12-19
Abstract
Abstract Light polarizers stabilized against effects of temperature and humidity are provided by a silylation method whereby a polyvinyl alcohol light-polarizing sheet is treated with an organosilane and is heated to bond the organosilane to the polyvinyl alcohol surface and to thereby silylate the surface thereof.
Inventors
- 👤 John F. Downey, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:44
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/04; C08J7/0427; C08J7/044; G; G02; G02B; G02B1/00; G02B1/08; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; C08J2329/00; C08J2329/02; C08J2329/04; C08J2483/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
28 words
A polyvinyl alcohol light-polarizing article comprising a molecularly oriented polyvinyl alcohol layer having dichroic light-polarizing molecules therein, at least one surface of said polyvinyl alcohol layer being organosilylated.
Claim 2
Dependent Claim
28 words
A polyvinyl alcohol light-polarizing article comprising a molecularly oriented polyvinyl alcohol layer having dichroic light-polarizing molecules therein, at least one surface of said polyvinyl alcohol layer being organosilylated.
Claim 3
Dependent Claim
20 words
The article of claim 1 wherein said polyvinyl alcohol layer having dichroic light-polarizing molecules therein comprises an iodine-stained light-polarizing layer.
Claim 4
Dependent Claim
27 words
The article of claim 1 wherein said polyvinyl alcohol layer having dichroic light-polarizing molecules therein comprises a molecularly oriented polyvinyl alcohol layer having polyvinylene light-polarizing molecules therein.
Claim 5
Dependent Claim
22 words
The article of claim 1 wherein said molecularly oriented polyvinyl alcohol layer having dichroic light-polarizing molecules therein comprises a borated light-polarizing layer.
Claim 6
Dependent Claim
16 words
The article of claim 1 wherein said light-polarizing layer is supported by a polymeric support sheet.
Claim 7
Dependent Claim
13 words
The article of claim 5 wherein said polymeric support sheet comprises polyehtylene terephthalate.
Claim 8
Dependent Claim
14 words
The article of claim 1 wherein one surface of said light-polarizing layer is organosilylated.
Claim 9
Dependent Claim
39 words
The article of claim 1 wherein said organosilylated surface is provided by contacting at least one surface of said light-polarizing layer with an organosilane and heating the layer sufficiently to bond the organosilane to the surface of said layer.
Claim 10
Dependent Claim
42 words
The article of claim 8 wherein said organosilane is obtained by hydrolysis of an organosilane of the formula R.sub.n --SiX.sub.(4-n) wherein R is a non-hydrolyzable organic radical; n is an integer of from one to three; and X is a hydrolyzable group.
Claim 11
Dependent Claim
14 words
The article of claim 9 wherein n is one and each X is alkoxy.
Claim 12
Dependent Claim
20 words
The article of claim 10 wherein R is a radical of the formula. ##STR3## wherein R' is alkyl or aminoalkyl.
Claim 13
Dependent Claim
15 words
The article of claim 11 wherein said R' is methyl and each X is methoxy.
Claim 14
Dependent Claim
15 words
The article of claim 11 wherein said R' is 2-aminoethyl and each X is methoxy.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |