US5352380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric liquid-crystalline polymers, a process for their preparation and their use in electrooptical components
Assignee: Hoechst AG
•
Filing: 1993-12-17
•
Granted: 1994-10-04
•
Expires: 2013-12-17
Abstract
Abstract A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula I ##STR1## in which Y=H or CH 3 a=an integer from 6 to 12 M=a group selected from the formulae which follow: ##STR2## in which --R 2 =--CH 3 or --Cl and b=an integer from 1 to 10. The abovementioned polymer has remarkably short response times. The polymer forms, alone or mixed with other LC components, an orthogonal smectic phase. It is possible to use this phase in the electroclinic mode.
Inventors
- 👤 Gunter Scherowsky
- 👤 Andreas Schliwa
- 👤 Wolfgang Trapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:51
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/30; C08F20/34; C08F20/36; C09; C09K; C09K19/00; C09K19/02; C09K19/0225; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3857
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
33 words
A ferroelectric, liquid-crystalline polymer composed of repeating units of the formula ##STR13## in which Y is H, a is 11, M is ##STR14## where --R 2 is --CH 3 and b is 5.
Claim 2
Dependent Claim
33 words
A ferroelectric, liquid-crystalline polymer composed of repeating units of the formula ##STR13## in which Y is H, a is 11, M is ##STR14## where --R 2 is --CH 3 and b is 5.
Claim 3
Dependent Claim
14 words
An electrooptical switch and display element containing a polymer as claimed in claim 1.
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) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |