US4818624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized light-polarizing material
Assignee: 3M Innovative Properties Co
•
Filing: 1986-12-19
•
Granted: 1989-04-04
•
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 12:30
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.
References Cited (Backward Citations)
US23297A
Cited
USRE23297E
Cited
US2173304A
Cited
US2445555A
Cited
US3941901A
Cited
US4151326A
Cited
US4150877A
Cited
US4166871A
Cited
US4235526A
Cited
US4381886A
Cited
US4387133A
Cited
US4472027A
Cited
US4396646A
Cited
US4617239A
Cited
US4564266A
Cited
US4603057A
Cited
US4674840A
Cited
US4544724A
Cited
US4659523A
Cited
US4591512A
Cited
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 |