US4564694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorless liquid crystalline compounds
Assignee: Kanto Chemical Co Inc
•
Filing: 1982-02-24
•
Granted: 1986-01-14
•
Expires: 2002-02-24
Abstract
Abstract A colorless liquid crystalline compound having at least one 6-membered ring and non-cyclic end groups in the molecular skelton, said 6-membered containing two or more carbon atoms, at least one of which is directly bonded to a methylene group of a non-cyclic group having an alkoxy group at another end has a wide mesomorphic range. When said colorless liquid crystalline compound is mixed with a liquid crystal composition, the resulting mixture also has an enlarge mesomorphic range and in almost all cases has a reduced viscosity.
Inventors
- 👤 Yoichi Hirai
- 👤 Tsunenori Fujii
- 👤 Kaoru Koto
- 👤 Kenji Suzuki
- 👤 Masahiro Yoshida
- 👤 Hisashi Okawa
- 👤 Yoshiaki Okabe
- 👤 Teruo Kitamura
- 👤 Hisao Yokokura
- 👤 Shintaroo Hattori
- 👤 Akio Mukoh
- 👤 Mikio Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C255/00; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C31/00; C07C31/13; C07C31/137; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/164; C07C43/168; C07C43/20; C07C43/21; C07C43/225; C07C43/23; C07C57/00; C07C57/46; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/30; C09K19/3001; C09K19/3003; C09K19/3066; C09K19/3068; C09K19/32; C09K19/321; C09K19/34; C09K19/3402; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3475; C09K2019/3422; C09K2019/3425
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
A colorless liquid crystalline compound of the formula: ##STR222## wherein R 4 and R 5 are independently a straight-chain or branched-chain alkyl group having 12 or less carbon atoms; X is --COO-- or --OCO--; and p is an integer of 1 to 8.
Claim 2
Dependent Claim
43 words
A colorless liquid crystalline compound of the formula: ##STR222## wherein R 4 and R 5 are independently a straight-chain or branched-chain alkyl group having 12 or less carbon atoms; X is --COO-- or --OCO--; and p is an integer of 1 to 8.
Claim 3
Dependent Claim
9 words
A colorless liquid crystalline compound of the formula ##STR223##
Claim 4
Dependent Claim
9 words
A colorless liquid crystalline compound of the formula ##STR223##
Claim 5
Dependent Claim
9 words
A colorless liquid crystalline compound of the formula ##STR224##
Claim 6
Dependent Claim
9 words
A colorless liquid crystalline compound of the formula ##STR224##
Claim 7
Dependent Claim
27 words
A colorless liquid crystalline compound of the formula ##STR225## wherein n is an integer of 1 to 8, and m is an integer from 1 to 12.
Claim 8
Dependent Claim
27 words
A colorless liquid crystalline compound of the formula ##STR225## wherein n is an integer of 1 to 8, and m is an integer from 1 to 12.
References Cited (Backward Citations)
US4005064A
Cited
DD105701A1
Cited
JPS5268881A
Cited
US4130502A
Cited
US4158011A
Cited
US4181625A
Cited
US4198130A
Cited
US4372871A
Cited
US4229315A
Cited
US4261652A
Cited
US4279770A
Cited
JPS5710856A
Cited
US4374748A
Cited
JPS5777658A
Cited
JPS5799542A
Cited
US4431564A
Cited
JPS5849355A
Cited
DE3237020A1
Cited
US4468040A
Cited
JPS58121265A
Cited
JPS58121266A
Cited
JPS58131942A
Cited
JPS58134051A
Cited
JPS58134052A
Cited
JPS58134046A
Cited
US4452719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |