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US4864008A
Expired / Lapsed
US
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Diamond compounds and liquid crystal aligning films
Assignee: JNC Corp
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Filing: 1988-03-08
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Granted: 1989-09-05
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Expires: 2008-03-08
Abstract
Abstract The present invention provides diamino compounds and liquid crystal aligning films comprising polyimides which are obtained from the said diamino compounds represented by the general formula: ##STR1## wherein R 1 indicates an alkyl group having 3 to 22 carbon atoms, R 2 indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R 3 -R 10 indicate a hydrogen atom or a methyl group, respectively. The liquid crystal aligning films are useful for STN mode display cells in realizing a high pretilt angle.
Inventors
- 👤 Shizuo Murata
- 👤 Naoyoshi Emoto
- 👤 Kenji Furukawa
- 👤 Kouichi Kunimune
- 👤 Ryuji Kobayashi
- 👤 Masami Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133723; C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/38; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/105; C09; C09K; C09K2323/00; C09K2323/02; C09K2323/027; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A diamino compound represented by the general formula: ##STR9## wherein R 1 indicates an alkyl group having 3 to 22 carbon atoms, R 2 indicates an alkyl group having 1 to 22 carbon atoms, and R 3 -R 10 indicate a hydrogen atom or a methyl group, respectively.
Claim 2
Dependent Claim
48 words
A diamino compound represented by the general formula: ##STR9## wherein R 1 indicates an alkyl group having 3 to 22 carbon atoms, R 2 indicates an alkyl group having 1 to 22 carbon atoms, and R 3 -R 10 indicate a hydrogen atom or a methyl group, respectively.
Claim 3
Dependent Claim
25 words
A diamino compound as claimed in claim 1, wherein R 2 is a methyl group, and R 3 -R 10 indicate a hydrogen atom, respectively.
Claim 4
Dependent Claim
35 words
A diamino compound as claimed in claim 1, wherein R 2 is a methyl group, R 3 -R 10 indicate a hydrogen, respectively, and R 1 is a straight-chain alkyl group having 5-10 carbon atoms.
Claim 5
Dependent Claim
13 words
A diamino compound as claimed in claim 1, wherein the compound is 2,2-bis[4-(4-aminophenoxy)phenyl]decane.
Claim 6
Dependent Claim
13 words
A diamino compound as claimed in claim 1, wherein the compound is 2,2-bis[4-(4-aminophenoxy)phenyl]nonane.
Claim 7
Dependent Claim
13 words
A diamino compound as claimed in claim 1, wherein the compound is 2,2-bis[4-(4-aminophenoxy)phenyl]octane.
Claim 8
Dependent Claim
13 words
A diamino compound as claimed in claim 1, wherein the compound is 2,2-bis[4-(4-aminophenoxy)phenyl]heptane.
Claim 9
Dependent Claim
13 words
A diamino compound as claimed in claim 1, wherein the compound is 2,2-bis[4-(4-aminophenoxy)phenyl]hexane.
Claim 10
Dependent Claim
13 words
A diamino compound as claimed in claim 1, wherein the compound is 2,2-bis[4-(4-aminophenoxy)phenyl]pentane.
References Cited (Backward Citations)
US4316844A
Cited
US4696994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |