US4344856A
Expired / Lapsed
US
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Crystalline-liquid substituted 1,3-dioxanes and mixtures containing them
Assignee: Samsung SDI Co Ltd
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Filing: 1980-01-10
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Granted: 1982-08-17
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Expires: 2000-01-10
Abstract
Abstract The invention concerns crystalline liquid substituted 1,3-dioxanes and compositions containing the same for use in electro-optical components, characterized by at least one compound of the general formula: ##STR1## R 3 =C n H 2n+1 ; C n H 2n+1 O, Cl, Br, CN, NO 2 , and where R 4 =C n H 2n+1 and n=1 to 10.
Inventors
- 👤 Dietrich Demus
- 👤 Horst Zaschke
- 👤 Hans-Mathias Vorbrodt
- 👤 Horst Kresse
- 👤 Wolfgang Weissflog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:56
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C09K19/52; C09K19/54; C09K2019/3422
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
10 words
A compound of the formula: ##STR19## wherein n=1 to 10.
Claim 2
Dependent Claim
10 words
A compound of the formula: ##STR19## wherein n=1 to 10.
Claim 3
Dependent Claim
10 words
A compound of the formula: ##STR20## wherein n=1 to 10.
Claim 4
Dependent Claim
10 words
A compound of the formula: ##STR20## wherein n=1 to 10.
Claim 5
Dependent Claim
65 words
A liquid crystalline composition comprising a mixture of at least one compound selected from the group consisting of liquid crystalline substances, non-liquid crystalline substances, and mixtures thereof, and a compound of the general formula: ##STR21## R 3 =C n H 2n+1 ; C n H 2n+1 O; CF 3 ; CN; NO 2 ; R 4 =C n H 2n+1 , and n=1 to 10.
Claim 6
Dependent Claim
65 words
A liquid crystalline composition comprising a mixture of at least one compound selected from the group consisting of liquid crystalline substances, non-liquid crystalline substances, and mixtures thereof, and a compound of the general formula: ##STR21## R 3 =C n H 2n+1 ; C n H 2n+1 O; CF 3 ; CN; NO 2 ; R 4 =C n H 2n+1 , and n=1 to 10.
References Cited (Backward Citations)
US4200580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |