Patent US1928539A successfully refreshed from Google Patents.
Patent US4877858A successfully refreshed from Google Patents.
US4877858A
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Liquid-crystalline polymer
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1988-11-16
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Granted: 1989-10-31
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Expires: 2008-11-16
Abstract
Abstract A liquid-crystalline polymer comprising the repeating units of the general formula (I) ##STR1## in which: k is an integer from 1 to 30; and R 1 is ##STR2## where: X is --COO-- or --OCO--; and R 2 is --COOR 3 , OCOR 3 , or --OR 3 where: R 3 is ##STR3## R 4 and R 5 being each independently --CH 3 , a halogen radical, or --CN, m and n being each independently an integer from 0 to 10 with the proviso that n is not 0 when R 4 is --CH 3 , p being 0 or 1, and C marked with * being an asymmetric carbon atom. The polymers of the present invention exhibit a ferroelectricity even at temperatures around room temperature and as well such a high speed of response to external factors that they can be used for displaying motion pictures, and the polymers may also be advantageously used as display elements for large displays or curved displays.
Inventors
- 👤 Satoshi Hachiya
- 👤 Shunji Uchida
- 👤 Kenji Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:15
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3876; C09K19/388
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
104 words
A ferroelectric liquid-crystalline polymer comprising the repeating units of the general formula (I) ##STR140## in which: k is an interger from 1 to 30; and ##STR141## where: X is --COO-- or --OCO--; and R 2 is --COOR 3 , or --OR 3 where: R 3 is ##STR142## R 4 and R 5 being each independently --CH 3 , a halogen radical, or --CN, m and n being each independently an integer from 0 to 10 with the proviso that n is not 0 when R 4 is --CH 3 , p being 0 or 1, and C marked with being an asymmetric carbon atom.
Claim 2
Dependent Claim
104 words
A ferroelectric liquid-crystalline polymer comprising the repeating units of the general formula (I) ##STR140## in which: k is an interger from 1 to 30; and ##STR141## where: X is --COO-- or --OCO--; and R 2 is --COOR 3 , or --OR 3 where: R 3 is ##STR142## R 4 and R 5 being each independently --CH 3 , a halogen radical, or --CN, m and n being each independently an integer from 0 to 10 with the proviso that n is not 0 when R 4 is --CH 3 , p being 0 or 1, and C marked with being an asymmetric carbon atom.
Claim 3
Dependent Claim
22 words
The ferroelectric liquid-crystalline polymer of claim 1 wherein the number average molecular weight of the liquid-crystalline polymer is from 2,000 to 400,000.
Claim 4
Dependent Claim
26 words
The ferroelectric liquid-crystalline polymer of claim 1 wherein the number average molecular weight of the liquid-crystalline polymer is less than 2,000 and not less than 1,000.
Claim 5
Dependent Claim
18 words
The ferroelectric liquid-crystalline polymer of claims 2 or 3 wherein k is an integer from 4 to 10.
Claim 6
Dependent Claim
20 words
The ferroelectric liquid-crystalline polymer of claims 2 or 3 wherein R 1 is selected from the group consisting of ##STR143##
Claim 7
Dependent Claim
20 words
The ferroelectric liquid-crystalline polymer of claims 2 or 3 wherein R 3 is selected from the group consisting of ##STR144##
Claim 8
Dependent Claim
17 words
The ferroelectric liquid-crystalline polymer of claim 1, wherein k is an integre of from 4 to 10.
Claim 9
Dependent Claim
29 words
The ferroelectric liquid-crystalline polymer of claim 1 wherein R 1 is selected from the group consisting of ##STR145## and R 3 is selected from the group consisting of ##STR146##
Claim 10
Dependent Claim
32 words
The ferroelectric liquid-crystalline polymer of claim 2 or claim 3 wherein R 1 is selected from the group consisting of ##STR147## and R 3 is selected from the group consisting of ##STR148##
Claim 11
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR149##
Claim 12
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR150##
Claim 13
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR151##
Claim 14
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR152##
Claim 15
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR153##
Claim 16
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR154##
Claim 17
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR155##
Claim 18
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR156##
Claim 19
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR157##
Claim 20
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR158##
Claim 21
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR159##
Claim 22
Dependent Claim
16 words
the ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR160##
Claim 23
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR161##
Claim 24
Dependent Claim
16 words
The ferroelectric liquid-crystalline polymer of claim 1 comprising the repeating units of the following formula ##STR162##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |