US3767289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Class of stable trans-stilbene compounds, some displaying nematic mesophases at or near room temperature and others in a range up to 100{20 {11 c
Assignee: International Business Machines Corp
•
Filing: 1970-12-31
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Granted: 1973-10-23
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Expires: 1990-12-31
Abstract
Abstract A new class of stable trans-stilbene compounds, some displaying nematic mesophases at or near room temperature and others in a range up to 100*C., are useful in liquid crystal display devices. Exemplary compounds are 4-butoxy, 4''-n-butyl- Beta -chloro transstilbene, having a nematic range of 30*-52*C., 4-ethoxy, 4''-nbutyl- Beta -chloro trans-stilbene, having a nematic range of 29*-58*C., and 4-ethoxy, 4''-(2-methylbutyl)- Beta -chloro transstilbene, having a nematic range of 29*-34*C.; a mixture containing 60 mole-% 4-ethoxy, 4''-n-butyl- Beta -chloro transstilbene and 40 mole-% 4-ethoxy-4''-n-octyl- Beta -chloro transstilbene has a nematic range of 8*-59*C.
Inventors
- 👤 W Young
- 👤 A Aviram
- 👤 R Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:09
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/14; C09K19/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
26 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-n-butoxy, 4''-n-butyl-Beta -chloro trans-stilbene having a nematic range of 30*-52*C.
Claim 2
Dependent Claim
26 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-n-butyl-Beta -chloro trans-stilbene having a nematic range of 29*-58*C.
Claim 3
Dependent Claim
28 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-(2 methylpentyl)- Beta -chloro trans-stilbene having a nematic range of 32*-41*C.
Claim 4
Dependent Claim
26 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-n-pentyl-Beta -chloro trans-stilbene, having a nematic range of 52*-69*C.
Claim 5
Dependent Claim
26 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-n-butyl-Alpha -chloro trans-stilbene, having a nematic range of 36*-56*C.
Claim 6
Dependent Claim
27 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-n-hexyloxy, 4''-n-butyl- Beta -chloro trans-stilbene having a nematic range of 33*-53*C.
Claim 7
Dependent Claim
27 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-(2-methylhexyl)- Beta -chloro trans-stilbene having a nematic range of 22*-35*C.
Claim 8
Dependent Claim
27 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-n-heptyloxy, 4''-n-propyl- Beta -chloro trans-stilbene, having a nematic range of 42*-58*C.
Claim 9
Dependent Claim
27 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-hexyl- Beta -chloro trans-stilbene, having a nematic range of 34*-59*C.
Claim 10
Dependent Claim
26 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-n-octyl-Beta -chloro trans-stilbene, having a nematic range of 32*-61*C.
Claim 11
Dependent Claim
27 words
In an electro-optical display device as claimed in claim 1, wherein said composition is the compound 4-ethoxy, 4''-(2-methylbutyl)- Beta -chloro trans-stilbene, having a nematic range of 29*-34*C.
Claim 12
Dependent Claim
43 words
In an electro-optical display device as claimed in claim 1, wherein said composition is a mixture containing 60 mole-% of 4-ethoxy, 4''-butyl- Beta -chloro trans-stilbene and 40 mole-% of 4-ethoxy, 4''-n-octyl- Beta -chloro trans-stilbene, said mixture having a nematic range of from 8*-59*C.
Claim 13
Dependent Claim
43 words
In an electro-optical display device as claimed in claim 1, wherein said composition is a mixture containing 50 mole-% of 4-n-butyoxy, 4''-n-butoxy- Alpha -methyl trans-stilbene and 50 mole-% of 4-methoxy, 4''-n-octyoxy- Beta -chloro trans-stilbene, said mixture having a nematic range of from 75*-92*C.
Claim 14
Dependent Claim
42 words
In an electro-optical display device as claimed in claim 1, wherein said composition is a mixture containing 50 mole-% of 4-n-butoxy, 4''-n-butoxy- Alpha -methyl trans-stilbene and 50 mole-% of 4,4''-diethoxy- Alpha -methyl trans-stilbene, said mixture having a nematic range of from 85*-110*C.
Claim 15
Dependent Claim
43 words
In an electro-optical display device as claimed in claim 1, wherein said composition is a mixture containing 50 mole-% of 4-acetoxy, 4''-n-butyl- Beta -chloro trans-stilbene and 50 mole-% of 4-cyano, 4''-n-butyl- Beta -chloro trans-stilbene, a mixture having a nematic range of from 29*-39*C.
References Cited (Backward Citations)
US3322485A
Cited
GB1170486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |