US3965029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal materials
Assignee: Kent State University
•
Filing: 1974-02-04
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Granted: 1976-06-22
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Expires: 1994-02-04
Abstract
Abstract Disclosed are alkoxybenzalmethylphenylenediamines and methylbenzalbutylaniline as liquid crystal materials, and eutectic mixtures of these as long life liquid crystal materials.
Inventors
- 👤 Sardari L. Arora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:30
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
17 words
A liquid crystal material comprising a mixture of at least one Bis-(4'-n-alkoxybenzal) - 2-methyl-1, 4-phenylenediamine and 4-methylbenzal-4'-n-butylaniline.
Claim 2
Dependent Claim
17 words
A liquid crystal material comprising a mixture of at least one Bis-(4'-n-alkoxybenzal) - 2-methyl-1, 4-phenylenediamine and 4-methylbenzal-4'-n-butylaniline.
Claim 3
Dependent Claim
13 words
The liquid crystal material of claim 1 in which the alkoxy is octyloxy.
Claim 4
Dependent Claim
13 words
The liquid crystal material of claim 1 in which the alkoxy is nonyloxy.
Claim 5
Dependent Claim
13 words
The liquid crystal material of claim 1 in which the alkoxy is decyloxy.
Claim 6
Dependent Claim
13 words
The liquid crystal material of claim 1 in which the alkoxy is dodecyloxy.
Claim 7
Dependent Claim
17 words
A liquid crystal material comprising a mixture of about one mol Bis-(4'-octyloxybenzal)-2-methyl-1,4-phenylenediamine and about five mols 4-methylbenzal-4'-n-butylaniline.
Claim 8
Dependent Claim
17 words
A liquid crystal material comprising a mixture of about one mol Bis-(4'-octyloxybenzal)-2-methyl-1,4-phenylenediamine and about five mols 4-methylbenzal-4'-n-butylaniline.
References Cited (Backward Citations)
US3690745A
Cited
US3675987A
Cited
US3731986A
Cited
US3655270A
Cited
US3756694A
Cited
US3838059A
Cited
US3826757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |