Patent US6380096B2 successfully refreshed from Google Patents.
US5246748A
Expired / Lapsed
US
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Thin film optical medium of a multiple amphiphilic bilayer composite
Assignee: CNA Holdings LLC
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Filing: 1991-12-23
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Granted: 1993-09-21
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Expires: 2011-12-23
Abstract
Abstract This invention provides novel self-assembled multilayer organic thin films including an azo-benzene chromophore which initially appear substantially amorphous when viewed perpendicular to the film surface, but are subsequently treated with a laser in selected areas so that such portions exhibit photo-induced birefringence.
Inventors
- 👤 Gunilla E. Gillberg-LaForce
- 👤 David E. Nikles
- 👤 Leroy McKenzie
- 👤 Bettina E. Bonsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:04
CPC Classifications
C; C09; C09K; C09K9/00; C09K9/02; B; B82; B82Y; B82Y30/00; C09K19/00; C09K19/52; C09K2019/528; C09K2323/00; C09K2323/02; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A thin film optical medium which is a composite, comprising a nonionic water-soluble polymer having a molecular weight in the range of from 50,000 to 2,000,000 and a solubility in water of at least 1-10 weight per cent at 25° C. and being selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, guar gum, locust bean gum and xanthan gum and a self-assembled bilayer of an amphiphilic compound corresponding to the formula: ##STR5## where R is an aliphatic substituent having a chain length of about 6-18 atoms; R 1 is a divalent aliphatic moiety selected from the group consisting of ethylene, butylene, decylene, docecylene and polyethylene; R 2 is hydrogen or a C 1 -C 4 alkyl substituent, X is a divalent electron-donating substituent; R 3 is methyl or hydroxyethyl and A is an anion wherein the ratio of said polymer component and said amphiphilic compound is from about 0.3 to about 0.5 and wherein said medium is transparent when viewed perpendicular to the film surface, said polymer being present in an amount from about 20 to about 80 weight per cent.
Claim 2
Dependent Claim
181 words
A thin film optical medium which is a composite, comprising a nonionic water-soluble polymer having a molecular weight in the range of from 50,000 to 2,000,000 and a solubility in water of at least 1-10 weight per cent at 25° C. and being selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, guar gum, locust bean gum and xanthan gum and a self-assembled bilayer of an amphiphilic compound corresponding to the formula: ##STR5## where R is an aliphatic substituent having a chain length of about 6-18 atoms; R 1 is a divalent aliphatic moiety selected from the group consisting of ethylene, butylene, decylene, docecylene and polyethylene; R 2 is hydrogen or a C 1 -C 4 alkyl substituent, X is a divalent electron-donating substituent; R 3 is methyl or hydroxyethyl and A is an anion wherein the ratio of said polymer component and said amphiphilic compound is from about 0.3 to about 0.5 and wherein said medium is transparent when viewed perpendicular to the film surface, said polymer being present in an amount from about 20 to about 80 weight per cent.
References Cited (Backward Citations)
US5072234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |