US4131334A
Expired / Lapsed
US
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Light polarizing materials, suspensions thereof, and process for manufacturing such suspensions
Assignee: Research Frontiers Inc
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Filing: 1977-05-11
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Granted: 1978-12-26
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Expires: 1997-05-11
Abstract
Abstract An aliphatically unsaturated organic compound is hydrogenated to form a saturated compound and a salt of the saturated compound is reacted with a halogen and a halide to form a light-polarizing material. The light-polarizing material in the form of crystalline particles is dispersed in a suitable suspending medium to produce a fluid suspension thereof. The suspension is useful in light valves.
Inventors
- 👤 Michael Witte
- 👤 Robert L. Saxe
- 👤 Robert I. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
C; C07; C07D; C07D453/00; C07D453/02; C07D453/04; G; G02; G02F; G02F1/00; G02F1/01; G02F1/17; G02F1/172
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
71 words
A method for forming a light-polarizing material for use in a light valve, comprising: (a) hydrogenating an unsaturated bond of a branch chain of an organic compound to form a saturated bond compound; (b) forming a salt of the compound formed in step a; (c) forming a perhalide of the compound of step b; and (d) forming a suspension of the perhalide in a liquid, wherein the suspension is light polarizing.
Claim 2
Independent Claim
71 words
A method for forming a light-polarizing material for use in a light valve, comprising: (a) hydrogenating an unsaturated bond of a branch chain of an organic compound to form a saturated bond compound; (b) forming a salt of the compound formed in step a; (c) forming a perhalide of the compound of step b; and (d) forming a suspension of the perhalide in a liquid, wherein the suspension is light polarizing.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein the slit is formed by reaction of the saturated bond compound with an acid.
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein the perhalide is formed by reaction of the compound of step b with a halide and a halogen.
Claim 5
Dependent Claim
12 words
The method of a claim 1, wherein the liquid is an ester.
Claim 6
Dependent Claim
27 words
The method of claim 1, wherein the organic compound comprises an aryl group and wherein the unsaturated bond is on a branch chain of the aryl group.
Claim 7
Dependent Claim
12 words
The method of claim 5, wherein the organic compound is an alkaloid.
Claim 8
Dependent Claim
11 words
The method of claim 5, wherein the organic compound is cinchonidine.
Claim 9
Dependent Claim
18 words
The method of claim 5, wherein the organic compound has the said saturated bond in the alpha position.
Claim 10
Dependent Claim
27 words
The method of claim 1, wherein the salt is formed by reaction with an acid taken from the group consisting of sulfuric acid and polybasic organic acids.
Claim 11
Dependent Claim
43 words
A light-polarizing material for use in a light valve comprising, a liquid suspension of particles comprising a perhalide of an organic compound having an aryl group and a saturated branch connected to the aryl group, wherein said particles are light-polarizing in said suspension.
Claim 12
Dependent Claim
43 words
A light-polarizing material for use in a light valve comprising, a liquid suspension of particles comprising a perhalide of an organic compound having an aryl group and a saturated branch connected to the aryl group, wherein said particles are light-polarizing in said suspension.
Claim 13
Dependent Claim
17 words
The light-polarizing material of claim 10, wherein the unsaturated form of said organic compound is an alkaloid.
Claim 14
Dependent Claim
16 words
The light-polarizing material of claim 10, wherein the unsaturated form of said organic compound is cinchonidine.
Claim 15
Dependent Claim
16 words
The light-polarizing material of claim 10, wherein the unsaturated form of said organic compound is quinine.
Claim 16
Dependent Claim
18 words
The light-polarizing material of claim 10, wherein the organic compound further comprises the addition of an acid moiety.
Claim 17
Dependent Claim
24 words
The light-polarizing material of claim 14, wherein the acid is an acid taken from the group consisting of sulfuric acid and polybasic organic acids.
Claim 18
Dependent Claim
14 words
The light-polarizing material of claim 14, wherein the acid is a hydroxy organic acid.
Claim 19
Dependent Claim
11 words
The light-polarizing material of claim 10, wherein the particles are colloidal.
Claim 20
Dependent Claim
12 words
The light-polarizing material of claim 10, wherein the liquid is an ester.
Claim 21
Dependent Claim
14 words
The light-polarizing material of claim 10, wherein the perhalide comprises a mixture of halides.
References Cited (Backward Citations)
US1955923A
Cited
US3989639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |